The Best Swordsmen in/of One Piece
This list aint about "powerful characters that wielding blades" its about "powerful characters cuz of their swordsmanship". So Law stronger than Vista , Zoro and Cavendish but Law has a very OP fruit and he is mostly rely on it. So thats why he would be under Zoro but that doesnt mean he is less powerful than him.
This list mostly about my opinions.
I dont think Shiki is a swordsman cuz he actually performing martial art style things only difference is his legs are actually twin blades but that doesnt make him a swordsman.
Jack the Drought also aint a swordsman. .His weapon more like a kama blade.
Killer also aint a swordsman he has blade like body parts.