Maito Gai!!! he takes the cake, he's inarguably Kage level and all he does is go around punching and kicking!
That's much more impressive to me than Kakashi who has hundreds of jutsu, a mangekyou sharingan, one of the most OP techniques in the Narutoverse (Kamui), the ability to use water, lightning, and earth ninjutsu, etc.
Might gai is the only real choice here. His taijutsu is probably the only in the narutoverse that can actually effect a susanoo without the aid of ninjutsu.
just because everyone says gui im going with bushy brow he'd kick gui's ass fifth gate vs sixth and if he opened the sixth gate and i say he should he'd dominate