Ali implements the perfect strategy to beat all 3. Foreman grills all 3. Fraizer smokes AJ and Usyk. Loses UD to Fury. Norton loses to AJ and Fury but beats Usyk. These modern fighters careers are still unfolding so I reserve the right to modify these hypothetical predictions according to their future performances.
I really dunno , but all I know is that bodybuilder Joshua probably wouldn't look like a bodybuilder back then . And puny Usyk would probably be even more scrawny, like a 170lb stick insect! These modern day behemoths are just too big for those yesterday guys!
All three of them would have beaten Leon Spinks, he was smaller than all three of them and had nowhere near the power of AJ.
Fury will be fine. Joshua would be top 10 say around 5-6 but not the champ. Usyk could beat the lower guys (Bugner, Wepner, etc.) but struggle against Ali, Foreman, Frazier, Shavers, etc.
70 ies? Prime 30-33 y.o Usyk I think had beated Norton due to styles and had less torture vs Frazier while Foreman might gave him more problems, if young prime Foreman, I think he might KO Usyk unlike Ali version from 70 ies, this version most likely had lost vs prime Usyk on fair cards even in 2 or 3 fights in row. Ali from 60 ies Usyk will not beat.
You appear to think very highly of Usyk. Frankly, I do not think he beats some of today's HW let alone from the 70s. Let him fight a couple of decent names and we'll see where he stands.
Well, I think for you decent names are only western names. For me Ali from 70 ies was worse than prime Huck. Nothing decent and nothing notable and definitely NOTHING GOOD. Besides his chin and King
If so, then vs prime Usyk 30-32 y.o versions most likely Bugner had more chances to win prime Usyk. Shavers despite powerful was too predictable and a bit too slow.
Prime Usyk had better legs than Ali form 70 ies but worse legs than Ali from 60 ies and he was mobile high guard boxer with modern style. Unlike a lot of older decades boxers, he like a lot of modern boxers had more chances vs Norton also not alone cos this, he was excellent in fight with jabs from high guard. Norton had advantages vs a lot of old styles boxers exactly due their guards styles. Usyk also is approx 217 lber and this size is larger than a lot of HW division boxers then had. Now most likely old Usyk had performed vs Chisora better than young and already enough experienced Parker in 241 lbs who I had assumed that will look better vs Chisora than Usyk exactly due his size and age difference with Usyk.