This has been done 1000s of times. A few that I wish we could've seen but didn't. Arguello vs Durán Apostli vs Graziano Frazier vs Norton Wallcott vs Moore Langford vs Greb Would be my top 5. It looks like a good few now aren't gonna happen either.
Lewis vs Bowe. Spinks vs Saad even though their primes don't quite match up. Matthew had the style to make that fight very exciting regardless. Tyson vs Holyfield in 1991 would have been interesting. I feel either man could win. Tyson could have very well bombed Holyfield out in a firefight, or Vander could have outworked Tyson and broken his will.
I would love to have seen Foreman stay on after the Jimmy Young fight in March 1977 and fight Larry Holmes the next year, March 1978 (this would be the same Holmes who beat Shavers handily the first time). Though I don't think that Foreman was the one who beat Frazier in 1973, it would have still been really interesting to see imo. It would also been very dependent on that time period, in the sense that Foreman seemed to get knocked down a lot more in the 70s, where in the 90s he just couldn't seem to get knocked down. I think Larry would have treated George like Shavers that first time, outboxing him. But I think there might have been a Foreman knockdown by Larry (if Jimmy Young did it, Holmes most certainly would have). I don't see Larry stopping George, but winning by at least a majority decision.
The Bowe-Lewis matchup would have been especially interesting given different time frames. For me, the Bowe who first beat Holy knocks out that era of Lewis in 5. But the latter-era Bowe, the one who got badly beaten by Golota, would have been stopped by Lewis in 5.
Quarry vs Foreman Bonavena vs Foreman Quarry vs Bonavena Marciano vs Patterson Marxian vs Valdes Dempsey vs Greb Tunney vs Schmeling vs Sharkey
Vitali vs Wlad I hear that the reason they gave for them not fighting was that they didn’t want to upset their mother so that could mean that they themselves may have been up for it if they hadn’t given their word to her. It was always unlikely but it would have been mighty interesting if it had happened.