Mike Tyson IMO would've beaten any heavyweight opponent in history during his reign in the 80's. Let Ali stay on the ropes and try to take a barrage of punches from Tyson compared to the punches thrown by Foreman. Ali would've changed his mind real quick and tried another approach to beating Tyson.
Added on that Tyson was the second fastest heavyweight behind Ali, so it would've proved real difficult to stay away from tyson and fight backwards like Ali does. But Ali was a genius when it came to the ring, he would've pulled it off somehow. Other boxers were scard to death because they all knew they were going in agains't someone who was going to try to kill them, how is that a bad thing
