If anyone from yester year should be on here its Joe Louis because he considered by everything I've seen as the biggest puncher ever though I very much disagree with that.
CC for pointing that out mate.

How could we forget about Joe Louis

He could knock a man down with punches from an incredibly small distance, like that right hand against Schmeling in the second fight, by just getting ALL his bodyweight into the punch. He didn't need no big swing like Big george, just really knew how to throw a punch.