George Foreman: Few athletes have reinvented themselves more dramatically. In his first incarnation, he was the brooding basher taken down by Ali's "Rope a Dope" in The Rumble in the Jungle. He later became Big George, nice-guy hero to the masses as the oldest heavyweight champ in history. He had a short-lived TV show, playing, well, George. Even if you didn't know any of that, you know he's made millions selling a lean, mean grilling machine.