I will give you another name: David Carradine.
He's the actor starring in the TV series Kung Fu (among the other roles he played) and he is really good in Kung Fu. When Bruce Lee was still alive they fought to see who's best and David won:D
mmh... I think that Bruce Lee is the best fighter... but maybe it's not true.. I don't like so muche the martial art and I don't know very well this kind of sport