So if we take Buster from his one glorious night, and put him in with some of the greatest name's through out heavyweight history, are there other guys he beats? The Opponents need to be more or less at their peaks.
Based on the Young boxing lesson and how Foreman suffered with Lyles size and power… Marciano, Holmes (later reign) some versions of Ali 74 (30-70) 75 (50-50) 76 (70-30) and potentially 50-50 with Holyfield (later career) around the Tyson fight - all of these are really fun fights IMO.
That Douglas would easily be the best fighter (at their time of fighting him) that Rocky would meet. He'd struggle like hell to get past Buster's jab alone. If he was against Holmes as you say later on, then yes he definitely could get a win. A prime Holmes gets a win imo Mid to late 70 s Ali,they could be really entertaining fights! Young Ali would be a tough one to defeat by any one.