Rocky could box going back but he's not good at it. I am honestly giving Tua the best chance he's pretty compact and durable i can see him getting beat up but hurting Foreman every now and then with counter punches. Maybe Tysons a better choice but I feel he's a tad bit too suited for Foreman
They are all well inside Foreman's wheelhouse. Given Tyson's the best of them by far i'd say he's potentially the most trouble.
Baer’s considered short? He’s almost as tall as Foreman and has a comparable reach. That said I’d favor Marciano and Dempsey to stop Foreman, who was green in 1974. Tyson, Baer, and Ruiz against Foreman could go either way. Tua I don’t see being much of threat to Foreman, since he has no right hand.
I am giving Tyson a chance; assuming he can summon his peek-a-boo defense. Tyson's defensive skills were very good during the initial phase of his career.
Tua is my choice too, with Tyson a close second. My reason being is that Tua is just so damn durable and powerful, and he can go all night long. That means that if Foreman blows his wad, as he could do in his 70s version, Tua will be there to exploit it. Tyson himself tended to slow down later on too. Although I do think Tyson was more dangerous than Tua in the first half of a fight. Tyson would take the fight to the other guy, but in the case of 70s Foreman, the point is moot since that is what Foreman did anyway.