Zoro is one of the most skilled swordsmen in the world of One Piece. Having set out on the journey to find and defeat Dracule Mihawk to claim the title of the World's Greatest Swordsman, Zoro has made great progress for himself ever since. Right now, Zoro is on a Yonko crew, which means the standards are quite high for him. And, given the fact that he's the second strongest in the crew behind Luffy, it implies that Zoro is among the strongest characters in the world.