The devil fruits in One piece are all-encompassing. There are devil fruits that boost fighting power, some that offer a variety of support abilities, and ones that are, well useless.
Roronoa Zoro, the right-hand man of the future pirate king, is a genuine swordsman. He would likely find the act of relying on external strength a shameful one. Though he might be against it, that doesn't mean fans can't fantasize about it.
10 Benefit: Weapon weapon fruit
Weapon weapon fruit is the devil fruit eaten by Baby 5. This fruit speaks for itself. It's a paramecia type fruit that grants its user the ability to transform a part of, or the entire body into a weapon.
Fans all know that Zoro loves nothing more than swords. If he ate this fruit, he could transform into the stuff he loves the most. An alluring fruit for a swordsman.
9 Drag: Rust Rust fruit
There is nothing more enjoyable to a swordsman than a good sword fight. A true swordsman like Zoro would never resort to underhanded tricks during a sword fight, and the rust rust fruit's ability is exactly one of these underhanded tricks
The rust rust fruit grants its user the ability to make metal rust, and it's not just rust stains. This fruit is a nemesis to all swordsmen, Zoro is better off without it.
8 Benefit: Diamond Diamond fruit.
Despite having an unquestionable sharp offense, swordsmanship comes with a serious downside, which is defense. A typical swordsman would sacrifice his defense for more offense, but with the Kira Kira no mi (diamond diamond fruit), that downside can be balanced out.
The Kira Kira no mi allows its eater to coat themselves in diamond. And even in the world of One piece, diamond is one of the toughest objects.
7 Drag: Rubber Rubber fruit
Gomu Gomu no mi (Rubber Rubber fruit) is Luffy's signature fruit. And as fans all know, it grants Luffy the properties of Rubber. At first glance, the fruit would seem straight out useless, but after witnessing how amazingly Luffy utilizes it, fans might realize that there is more than meets the eye with this fruit.
Though the fruit is great and all, it's just not Zoro’s type. The fruit's abilities are more suited with straightforward attacks like Luffy's, but a bad match with attacks that need precision.
6 Benefit: String String fruit.
The Ito Ito no mi, or string string fruit, is a paramecia type devil fruit. Don't be tricked into underestimating this fruit because of its misleading name, otherwise, fans will regret it. Amongst all known paramecia type devil fruits, the Ito Ito no mi is situated at the top.
The Ito Ito no mi is an all-arounder. It has a solid defense and a sharp offense, sharp enough to easily cut stones. It covers the weaknesses of a swordsman and boosts their striking power, a perfect suit for Zoro.
5 Drag: spring spring fruit
The name of this fruit might be akin to the string string fruit, but the overall stats aren't. This fruit grants its user the characteristics of a spring. While it can provide enhanced agility, the cons outweigh the pros. At least for a swordsman.
The spring spring fruit does not suit Zoro's style of fighting. Imagine controlling a katana with a wobbly hand. By the time the sword manages to approach the enemy, many swordsmen would already be defeated.
4 Benefit: Dice Dice fruit
The Dice Dice fruit, or Supa Supa no mi, is another paramecia type devil fruit. This fruit grants its user the qualities of a steel blade, making them a literal swordman. One can manifest steel blades from any part of their body, from fingers to toes.
If 3 swords aren't enough to satisfy Zoro's blade's fixation, then he likely knows what devil fruit to eat. For all he know, this devil fruit is perfect for Zoro.
3 Drag: Human human fruit
The Human human fruit is, unlike the previous fruits, a zoan type devil fruit. And true to its name, it allows its eater to transform into...well, human. Maybe this fruit is not just useless to Zoro, maybe it's useless to any human. However, putting humans aside, This fruit's effects are magical on animals.
Chopper ate this fruit and went from an unassuming reindeer to a doctor, and a genius one at that.
2 Benefit: Bird Bird fruit: Model Phoenix.
Throughout the series, Zoro has battled against numerous opponents. While some are just riffraff, others have given him both a tough time and lots of injuries. Zoro is famous for his immense life force. The amount of severe injuries he gets in a serious fight is enough to kill a normal person at least a couple of times.
A good solution for these wounds would be the bird bird fruit: model phoenix. This fruit is a mythical zoan devil fruit. It can virtually heal any physical wound almost instantly.
1 Drag: Love Love fruit
The Mero Mero no mi, or love love fruit, is also a paramecia type devil fruit. It exploits the target's love or lust to turn them into stone. To use this fruit to its full potential, the user would have to be very attractive.
Now don't get me wrong, it's not that Zoro is unattractive. It's just that this fruit's abilities are below a person who is all about the samurai code.