The role of a captain is very important in every pirate crew. A crew cannot function properly without a captain and a crew can't be successful with a bad captain. There are a lot of responsibilities that are on the shoulders of a captain. Without the proper captain, a crew is destined for doom.

RELATED: 5 One Piece Characters Who Can Hear The Voice Of All Things (& 5 Who Can't)

There are many pirate crews in One Piece and they have consolidated their position as the best in the business. The captains of these famous crews are among the strongest in the world. In this post, we will be taking a look at the five best and five worst captains in One Piece.

10 Best: Edward Newgate

Edward Newgate and the Whitebeard Pirates during One Piece.

Edward Newgate was more commonly known as Whitebeard due to his iconic mustache. He was one of the Four Emperors who rule over the New World. When he was still alive, he was considered the "Strongest Man Alive," and that was way before Roger rose to prominence. Whitebeard had the Gura Gura no Mi, which made him unbeatable. Normally, one would expect a super strong pirate to have little to no regard for his crew, but Whitebeard was different. He treated all of his crewmates as family and called them his "sons." He even forgave Squardo for stabbing him at Marineford.

9 Worst: Big Mom

Big Mom Whole Cake Island

Big Mom is the ruler of Totto Land in the New World. She is the captain of the Big Mom Pirates. There is no doubt that Big Mom is one of the strongest characters in One Piece, but she is one of the worst captains in the series. Big Mom has no mercy for anyone, not even for her crew. It is freaky when you remember that her crew is composed of her own children. She is unforgiving and won't forgive a mistake. Big Mom is also a danger to everyone around when she gets her hunger attacks.

RELATED: One Piece: 10 Characters Who Can Beat Kaido, Ranked

8 Best: Monkey D. Luffy

Monkey D. Luffy is the captain of the Straw Hat Pirates. He is our rubbery boy, who is hoping to take the throne of the Pirate King for himself. Luffy's new bounty is over 1 Billion beris. Despite growing in power considerably, he is still very humble and respects his crew. If anyone of his crew members are in trouble, Luffy is willing to do anything to help them out and save them from any harm. He went to Enies Lobby to save Robin and to Whole Cake Island to save Sanji. It just shows his determination to save his crew.

7 Worst: Kaido

Kaido uses his Devil Fruit, Fish-Fish Fruit, Model: Azure Dragon, in One Piece's Wano Country arc.

Currently known as the "Strongest Creature Alive," Kaido is one pirate that no one wants to mess with. He is immortal and is capable of defeating most of the characters in One Piece. Kaido's devil fruit ability allows him to transform into a dragon. It's game over when Kaido uses this form. Kaido has a tendency to go on drunken rampages and it is the worst possible time to face him. He also has absolutely no hesitation about thrashing his crew members around. A great pirate, but not such a great captain.

6 Best: Shanks

Shanks holding the straw hat and putting an end to the Summit War during One Piece' Marineford arc

Next up on the list is the arguably the most popular Yonko, Shanks. Shanks is the captain of the Red Hair Pirates. He is one of the few characters in One Piece that powerful without even possessing a devil fruit. Shanks is a very respectable man and he is held in very regard by even the Marines. Shanks is normally a laid back individual, but he can't tolerate anyone disrespecting his crew and his friends. He is a wonderful pirate captain and it is pretty obvious that he is one of the few captains that anyone would like to work for.

5 Worst: Shiki

Shiki is the captain of the Golden Lion Pirates. He had his own Pirate Armada with which he sought to destroy Roger. However, he was defeated with the weather aiding Roger. Shiki respected Roger despite their rivalr, but it would have been nicer if Shiki also respected his crewmates. He only cares about the top officials in his crew and doesn't seem to care about the other people on his crew.

RELATED: One Piece: 10 Strongest Fighters Who Fought In Corrida Colosseum

4 Best: Roger

An up-close shot of Gol D Roger in One Piece

Roger was the captain of the Roger Pirates and the only person to make it to Raftel. After becoming the Pirate King, Roger was the number one enemy of the World Government. It is unknown what kind of power Roger possessed, but he is without a doubt one of the strongest characters in One Piece if not the strongest. Roger deeply cared for his crew and everyone in his crew respected him. That's one of the main reasons that they were able to conquer the Grand Line and make it their own. Shortly afterward, Roger turned himself in and was executed.

3 Worst: Donquixote Doflamingo

doflamingo in one piece

Is it really surprising to see arguably the evilest character in One Piece on the list? I wouldn't be if I were you. Doflamingo is currently imprisoned in Impel Down after being defeated by Monkey D. Luffy. He possesses the Ito Ito no Mi, that allows him to create and manipulate strings. Doflamingo is an iron-hearted, cruel man who is willing to kill anyone that dares to disobey him. He killed his father and his brother without even thinking twice.

2 Best: Eustass Kidd

Eustass Kid looking surprised in One Piece post-time skip.

Eustass Kidd is one of the members of the Worst Generation. He possesses an unknown devil fruit that allows him to control magnetism. Kidd is a very reckless pirate, who enjoys inflicting pain on others. He has a bounty of 470,000,000 beris which is one of the highest bounties among the Supernovas. Despite being cruel to other people, Kidd is actually very caring when it comes to his own crew, and only trusts them. Also, he was shocked to see Killer's condition at Wano.

1 Worst: Blackbeard

Blackbeard is the latest pirate to become a Yonko. He took the position of Whitebeard after his death. Blackbeard currently possesses two devil fruit abilities and is actually the first person who has done so. He has the Gura Gura no Mi and Yami Yami no Mi. Both of these abilities make him almost invincible. It isn't yet known how Teach is as a captain, but a man who murdered his crewmate for a devil fruit can't really be nice.

NEXT: One Piece: All Known Members Of Roger Pirates