Beowulf!!! High level fighter or even barb. More even than martial skill, I want high level martial classes to bust out with physical feats beyond mortal comprehension. Swimming miles through a hurricane while slaying sea monsters with a dagger. This is what a level 20 fighter should be able to do. Or even Saitama - a bit exaggerated, but the general concept of nullifying technique or magic with sheer athleticism (I don't need to teleport, I can break the sound barrier with my side-jumps!)