Yoooooooooooo!
Mike here, bringing in a fantastic supporting character from one of the best shonen mangas you've probably never read.
It's
Dougen, from the wonderful manga "Doubutsu No Kuni"(Animal Land).
It's about...well, it's about a land, and that land is full of animals. HUGE animals. There you go, quick and easy. Actually it starts pretty simple and then gets really out of control in an awesome way.
Dougen was the strongest of all tigers, who renounced the killing of innocent animals due to crushing guilt issues associated with his back-story. He'll be scaled down considerably, since he's
basically gundam-sized in his canon. He'll still probably be one of the largest guys in town, though. Just big enough to squeeze out of the train cart.