Is Grievous really the best non-force sensitive swordsman, or just the one whose physical enhancements combined with his skill lets him compete with force wielders at all? No matter how good your form is, if the guy you are fighting can amplify his swings and thrusts to be a barely visible blur with space magic you are going to get stomped.
If "best swordsman" is taking physicals into account then yeah the cybernetically empowered Grievous is the obvious answer, but I just thought this was worth considering. It is entirely possible that he is the best swordsman by feats and accolades even disregarding his enhancements. I lack the knowledge to say either way. What are your thoughts little niggas?
The most normal and actual swordsman I can think of(meaning no enhancements and using just a blade) would probably be Darca Nyl as far as being the best, can’t really think of anyone else who uses only a blade and has no armor or enhancements and trained for years, to the point where in his apparent late 60s he was still skilled enough to hold off a Dark Jedi.