World One piece it is full of powerful individuals fighting for supremacy on the high seas in an effort to assert their own control. As such, there are different organizations with different goals. While all these organizations are led by powerful individuals, they often need competent right hands to stand by their side and help them when the going gets tough. Over the years, Eiichiro Oda introduced quite a few powerful right hands, but only a handful managed to survive until the final saga, where they reached unprecedented levels of power.

One Piece: Top 10 Haki Users in All Yonko Crews
Yonko crews are the strongest on the Grand Line and have some of the best haki users in One Piece.
10
Bepo
Bepo is one of the most powerful and capable members of Trafalgar Law's crew. While not above Sachi and Penguin in terms of leadership, Beppo is definitely stronger in terms of strength. Both Sachi and Penguin realize this, which is why Eiichiro Oda treats him like his right-hand man.
In a recent battle with the Blackbeard Pirates on Wiener Island, Bepo unleashed his powerful Sulong form and demonstrated why he is worthy of being one of the most powerful right-hand men in the Final Saga. His current whereabouts remain unknown, but he and Law will return sooner rather than later in the Final Saga.
9
Killer
Killer is Eustace Kid's right-hand man and an incredibly powerful individual who has immense power at his disposal. His overall level is such that he was even ranked among the worst generation.
Killer also fought against the likes of Yonko in the Wano Country Arc, but was completely decimated by Red-haired Shanks in the Final Saga with a blow that wasn't even aimed at him. Overall, Killer is definitely one of the weakest right hands in One Piece, but still strong compared to the average pirate in the New World.
8
King
King is one of Yonko Kaida's three right-hand men, whom he also calls his “Catastrophes”, and is the strongest among them. He is also the very first person to join Kaid on his journey after being freed from Punk Hazard.
King is a Lunarian with tremendous abilities and also possesses the abilities of the ancient Zoan Ryu Ryu no Mi, Model: Pteranodon. Using these abilities, King becomes an incredibly convincing pirate with a bounty of 1.390 billion berries on his head. King dedicated his life to making Kaido the Pirate King as well as the next Joy Boy, but in the end, all of his dreams came crashing down when he faced off against Roronoa Zoro in the Wano Country Arc.
7
Shiryu
Shiryu is considered by Oda to be the second most trusted member of the Blackbeard Pirates. He also has immense strength due to the power of the Suke Suke no Mi he ate fairly recently.
Before joining the Blackbeard Pirates, Shiryu was the head jailer of Impel Down, imprisoned by Magellan for acts of brutality he committed with his sword Raiu. Shiryu is extremely powerful, and as Eiichiro Oda moves on to the Blackbeard Pirates, his overall character will be explored much more.

One Piece: The 32 Strongest Swordsmen, Ranked
Considering its tumultuous setting, it's not surprising that talented swordsmen populate One Piece. Here are the strongest of the range.
6
Roronoa Zoro
Zoro is one of Pirate King Luffy's two Wings, equal to Sanji. He is Luffy's official right-hand man, recognized by Oda himself, despite not being the vice-captain of the crew. Zoro has incredible strength and has the ability to use all three types of Haki as well as the skills of a master swordsman. His goal is to defeat Dracula Mihawk and become the strongest swordsman in the world.
Zoro's primary goal is to make Luffy a pirate king, and only after helping his captain fulfill his ambitions does he consider himself worthy of fulfilling his own. Zoro's role in the final saga will be quite significant. Fans can't wait to see Oda further explore his character as a right winger.
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5
Marco
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Crew: Whitebeard Pirates (formerly)
Marco is Whitebeard's former right-hand man, also known as a highly respected and feared individual throughout the world. He served as the first captain of the Whitebeard Pirates and his power is comparable to that of an admiral.
At his peak, Marco makes great use of the power of Tori Tori no Mi, Model: Phoenix, instantly healing himself from any damage dealt to him. This combined with his overwhelming Haki allowed him to fight both the King and Queen together at the same time.
4
Sabo
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Group: Revolutionary Army
Sabo is the Chief of Staff of the Revolutionary Army and second in command of the entire group. He serves as Draco's right-hand man and is incredibly powerful, so much so that he can easily hold his own against Marine Admiral Fujitora. Sabo has immense power and fame throughout the world. His rank is now comparable to Yonk, who is designated as the Flame Emperor.
Sabo has shown the use of two types of Haki so far, but it wouldn't be a surprise to see him wield Conqueror's Haki in the Final Saga as well. He also has the power of the Mera Mera no Mi, which is Ace's devil fruit that allows him to be manipulated as well as transformed into flames.
3
Ben Beckman
Ben Beckman is the official vice-captain of the Red-Haired Pirates and one of the most feared individuals on the seas, whose presence can intimidate even a navy admiral. According to Eiichiro Oda, Ben Beckman is the opposite of Shanks and is often calmer and more composed. Shanks' worst impulses are tempered at times by Beckman, and this shows his immense role on the team.
Ben Beckman has tremendous power and according to the official 4 billion, his Haki is even greater than that of naval admirals, which shows how much of a talented fighter he is.
2
Dracula Mihawk
Dracule Mihawk was until recently a member of the Shichibukai, but has now moved to the Cross Guild, serving under Yonko Buggy. Of all Buggy's henchmen, Mihawk is the strongest, making him one of the most powerful right-hand men in the One Piece world.
Mihawk has a reward of 3,590,000,000 berries and that number alone shows tremendous power. The fact that his bounty rivals the Yonko of the One Piece world is proof enough that he is among the strongest and most elite fighters.
1
Silver Rayleigh
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Crew: Roger Pirates (formerly)
Of all the real men in the world One piecethe one standing at the very top now is Silvers Rayleigh. In his prime, Rayleigh was an absolute monster that matched Whitebeard in strength. Additionally, in the One Piece Elbaf Arc, Eiichiro Oda confirmed that Rayleigh and Scopper Gaban were both on par with Roger, with only slight differences in power.
In his prime, Silver Rayleigh was far more powerful than most Yonks and a figure that even the Navy wouldn't dare approach. Rayleigh wielded all three types of Haki with immense proficiency and was quite easily the strongest right hand in One Piece.
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