7-1, 328-pound Nikolai Valuev has a heavyweight title belt. I saw him fight against a regular 6-2, 233-pound heavyweight, and the "little guy" couldn't hurt him. Valuev actually doesn't hit that hard, but he's constantly wearing his opponents down with his reach and leverage. Also his head looks like it's made of concrete, and it's about as big as a large watermelon.
Watching the fight, I kept thinking that Shaq could win the heavyweight title easily if he took a few years to learn how to box. Shaq would be this guy with MUCH more quickness and tons more power.