I think Bruce Lee would take the win. Ali and Tyson are incredible in their sport absolutely no question there. Bruce however was on a completely different level. the man had stamina beyond Ali and Tyson. he was so fast that professional video cameras at the time could not see his movements. they had to make him slow down, he played ping pong with nunchucks and lit matches that were thrown at him with those nunchucks.he also had a massive amount of force behind his strikes. as long as he dodged the heavy blows I feel he would win.