Ali, Frazier, Foreman etc...
I saw Ali and Frazier and Foreman and all of them fight, going back into the late 70s.
Ali is the most overrated fighter in the history of the sport. His cultural importance, civil rights status, and so on, contribute greatly to his perceived might in the ring.
Footwork and jabs would not have helped Ali. Tyson in his prime would have cut the ring off and annihilated Ali. That's why Tyson in his prime is the best ever.
Old timers and purists hate Tyson because of who he was as a person - rapist, ear biter, and so on.
He would knock guys out with a grazing left hook like he was fighting children. He'd go entire fights and not get hit.
Ali would dance around for 12 rounds trying to cut the other guy.
Tyson haters like to believe that Tyson got so many early round KOs because guys were "afraid of him" or had "talked themselves into defeat before getting into the ring." Horsesh-t. He had early round KOs because he was a monster and even guys trying to run away from him in the ring couldn't get away from his power, speed, and quickness.
Flat out would have destroyed the old time fighters in their prime.
Iron Mike was one of a kind. Power, speed, ferocity, quickness, precision - nobody even comes close to Mike in his prime.