Ali would definitely defeat the 2. Tyson would definitely defeat Wladimir, quite difficult to determine the Vitali-Tyson outcome as Tyson has shown the odd vulnerability against taller opposition - possibly KO to Tyson or UD to Vitali?
Even Special K would struggle against Vitali. Of course through all adversity he'd win in the end, but it'd be a tough ride!
Tough call, Vitali is an ATG h2h. Ali only fought one guy near this height in his prime, and that was Terell, who was not nearly as good. Foreman had the power to beat Vitali up, but this is hard to nail down due to neither guy seeing a fighter of similar attributes as the other. The toughest call for me is Tyson. He's just so small in comparison, but Vitali has never been near a guy this skillful. I can't see how anyone can say for sure how these fights would turn out. My head leans toward Vitali in all of these bouts. Just too big and strong with a great style to suit his body.
Ali has too much speed, movement, and recuperative abilities. He would outbox both brothers and stop Wlad late. Foreman would knockout both. Foreman Manhandles Wlad in two rounds. He has too much power for Vitali as well. Foreman walk Vitali down. Tyson has too much speed and power. He would Slip Wlads jabs and unload devastating blows to the body and head. He finishes Wlad with left hooks. Tyson tkos Vitali. Vitali is way too slow. Body shots would wear Vitali down. Tyson Tko7. Ali Foreman and Tyson are on a higher level and They have beaten a higher class of competition.