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.