It seems like almost every hero in the DC Universe has had an opportunity to be a part of the Justice League. Countless iterations of the League have popped up over the decades: the Justice League, the Justice League of America, Justice League International, Justice League Dark, Justice League Odyssey, Justice League Europe, Justice League Task Force and even the Justice League Detroit.

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Some teams were meant to lead the way for the DC Universe like Geoff Johns' New 52 team and the original "pantheon" from Grant Morrison's JLA, while others featured hapless bands of misfits like the original Justice League International or supernatural experts and entities like the Justice League Dark. With so many different teams came any number of roster configurations, and the Justice League had a few unexpected members that either made or broke their respective teams.

10 UNDERUSED: Captain Cold

Captain Cold vs Flash Cropped

In the wake of Forever Evil, as a thank you for their efforts in defeating the Crime Syndicate on Earth, both Lex Luthor and Captain Cold were granted admission to the Justice League. This was an interesting evolution in Cold's character, having always been characterized as a thief with a heart of gold and a code of honor, as he was given the chance to prove his worth to the people he disdained so much. Writer Geoff Johns always had an incredible command on Captain Cold dating back to his run on The Flash, and his "fish out of water" time with the League was a treat for long time fans, and didn't last quite long enough. We'll see you back in the spotlight someday, Captain.

9 OVERSTAYED: Killer Frost

Killer Frost shoots shards of ice from her hands

Killer Frost was central to one of the first Justice League events in the DC Rebirth era, Justice League vs. Suicide Squad. After helping save the world from the terrors of Eclipso, she was granted admission to the newly formed JLA, designed to give certain heroes a chance at redemption and the big time. The problem was, that after that event, she didn't necessarily feel as essential to the plot of Steve Orlando's JLA as she was seemingly groomed to be. Much of the heavy lifting in that series came from a character we'll see later on in this list.

8 UNDERUSED: Super-Chief

Super-Chief

Super-Chief, we hardly knew ye! In his most modern appearance, Super-Chief lasted for only two weeks as a part of Firestorm's unofficial Justice League during the 52 event in the aftermath of Infinite Crisis. Canonically one of the oldest American superheroes, the identity of the Super-Chief was passed down across the generations via a meteorite that gave a member of the Algonquian tribe "the strength of a thousand bears, the speed of a thousand running deer, the keen senses of the wolf nation, and the power in his legs to leap higher than the tallest trees in the forest."

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Unfortunately, Super-Chief hasn't been seen since he was resurrected as a Black Lantern during the Blackest Night event, but given the right story, a deep dive into the character's history could add a significant sense of diversity and history into the Justice League.

7 OVERSTAYED: Dr. Light

Dr. Light's a pretty simple one for the overstayed category. Ever since the Identity Crisis event, in which it was revealed that the villainous version of Dr. Light snuck onto the JLA Satellite and raped Sue Dibny, wife of the Elongated Man, the Dr. Light persona has been very non grata. After the immense backlash to this revelation by the comics community, DC has tried to reinvent the character in several ways including as a female Justice Leaguer. But the bad taste still lingers, and this is a character that has been destroyed beyond repair. No need to keep this one around any longer.

6 UNDERUSED: Vixen

Vixen uses her claws in DC Comics

Vixen's place on this list is not for lack of trying. She was the star of an animated series for the digital first network CW Seed and led the Justice League of America team written by Steve Orlando mentioned earlier in this article. Vixen has come close on several occasions to making the jump to the big time, but hasn't quite hit that stride yet.

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Her goal with the JLA team she led, focusing on a team that was more active in the community it served, was a noble one, and an interesting storytelling concept for that series on the whole. Vixen has the potential to be the ultimate grassroots hero, both with her history of activism and powers drawn from life on earth, but hasn't quite had the story to elevate her to A-tier status.

5 OVERSTAYED: Vibe

3. Vibe Justice League

Guys, they really, really tried with this one. After spending decades as an ongoing joke of a Justice Leaguer, DC decided to give Vibe a legitimate shot as a hero during the New 52. After reaching some semblance of popularity through the CW TV series The Flash, DC put Vibe in their newly launched Justice League of America series during the New 52. They even gave him his own solo title for awhile! However, even with his dimension hopping power upgrade, the character's solo title failed, the JLA title ended after the conclusion of the Forever Evil event, and Vibe, rightfully, hasn't been seen since.

4 UNDERUSED: Zauriel

Zauriel in his armor holding a chain

Remember that time that there was a legitimate biblical angel in the Justice League? Originally intended to be the Hawkman of Grant Morrison's run on JLA, Zauriel was an angel cast out of heaven after falling in love with a human woman. He becomes aware of a plot by a renegade angel, Asmodel, to overthrow the Presence in heaven, and teams up with the Justice League to defeat him. Zauriel's inclusion in the Justice League allowed Morrison to explore much of the supernatural side of the DC Universe through Judeo-Christian mythology in some of the most bombastic Justice League stories of the last 30 years.

3 OVERSTAYED: Hal Jordan

Green Lantern Hal Jordan Season 2

Hal Jordan didn't overstay his welcome in the sense that he didn't fit on the team, he was a founding member after all, but in that his particular personality isn't quite suited to an Earth-bound Justice League. In the modern era, Hal has been characterized well as the lone ranger, cowboy, wild card type of Green Lantern. He doesn't do well with authority, and doesn't like to play by anybody's rules except his own.

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His character has found room to grow in stories that allow him the space to be himself, like Grant Morrison's current series The Green Lantern. Green Lanterns like John Stewart and Kyle Rayner feel more suited to represent the Corps for the premiere super-team of their home sector.

2 UNDERUSED: The Atom

One of the great heroes of an era that spawned many science-based heroes like The Flash, The Atom doesn't get nearly the love he deserves, especially in comparison to the other bite-sized hero over at Marvel. Atom stories open up a whole playground for the DCU, the Microverse, and exhibit a well-fleshed out mentor-student relationship between the two people to wear the mantle: Ray Palmer and Ryan Choi. In a technology-driven world, potentially starring an Asian-American superhero, and after a significant run as a major player in the Arrowverse, it's honestly surprising we haven't seen more of The Atom in the DCU.

1 OVERSTAYED: John Constantine

John Constantine has been a controversial addition to the DC Universe since he was brought into the world of superheroes with the New 52 in Justice League Dark. Fans of the character's initial Vertigo Comics characterization became disheartened that their favorite bastard sorcerer had been watered down for general audiences. In the years since, while the Justice League Dark title has been a welcome exploration into the supernatural side of the DCU, it's always been clear that Constantine doesn't work quite as well outside of stories with darker, adult themes. Luckily, his new solo series The Hellblazer takes place in the Sandman Universe imprint, which allows current writer Si Spurrier the freedom to write Constantine in a way that echoes his most popular Vertigo years.

NEXT: 10 Powerful DC Heroes Who Were Surprisingly Never Members Of The Justice League