The nearest I could find is Aiki, but even that has started giving the main character some challenges. I like manga where the lead develops like Kenichi just as much as the other guy, but for the time being, I want some curb-stomping delivered by the protagonist (unlike The Breaker, where said curbstumper is a supporting, albeit major, character).
Spoiler (highlight to view)
Gamaran's lead recently got his ass handed to him, and Akumetsu died,
so any suggestions? Thanks.