The father of modern martial arts cinema and creator of Jeet Kune Do, Bruce Lee moved so fast that cameras had to slow down to capture his strikes. At 135 pounds, he could send a 200-pound man flying with a one-inch punch and perform two-finger push-ups like a party trick. He didn't just break barriers—he kicked through them at 80 mph.

The self-proclaimed Greatest of All Time backed it up with a record that speaks for itself: 56 wins, Olympic gold, and three heavyweight championships. Ali's footwork was ballet, his jab was a piston, and his trash talk was Shakespeare in boxing gloves. He floated like a butterfly and stung like a freight train disguised as a bee.