Ah yes, another "best fighter/martial artist in the Marvel Universe" thread. It's always cool to see how people rank and formulate their lists. As for me, it goes:
Shang-Chi
Iron Fist
Captain America
Black Panther
Daredevil
Gamora
Mantis
Wolverine
Taskmaster
Karnak
Variant Comics made a list of Marvel's top martial artists. Proud that a certain master of Kung Fu is at the top:
I find it pretty cool that posters consider individuals like Spider-Man to be the best. Indeed, we are looking at the subject from different angles, which keeps things fresh. At the same time, are we factoring in powers and abilities or pure skill? More importantly, how do we really know who are the top fighters in the Marvel Universe? Does it come from guide books and Marvel rankings or were there real comics which stated them as such? For instance, I've been catching up on old issues of Shang-Chi's "Master of Kung Fu" title. He does a lot of cool stuff, taking down bad guys and what have you, but no one has come out and said he's the greatest martial artist on the planet (at least not yet anyway).
Me, I've definitely hope that there's some martial arts tournament arc in the future that finally sets in stone these debates.