Prime Tyson vs Prime Holyfield (1990-1991) Duran vs Pryor at 140-147 Tyson vs Bowe Bowe vs Lennox Oscar vs Tszyu at 140 Hopkins vs Toney Jones Jr. vs Dariusz, Benn, Eubank, Calzaghe (early 2000s), Hopkins rematch (2002-2003) Salvador Sanchez vs Eusebio Pedroza
Sanchez - Arguello Mosley - Tszyu Hopkins - Jones II in 2002 We could do this aaaalllll daaaay looong.
Aaron Pryor vs Sugar Ray Leonard (84/85/86) Unfortunately SRR retired during these years, directly after he came off 2 career best stoppage wins of Alexis Arguello. He also moved up a division in the Olympic trials, when AP was in the very same division as him. Not suggesting the great Sugar Ray ducked, but there's definately something he didn't like about Pryor.
Not a big fight but personally, i would liked to see Winky vs De La Hoya around 2004/2005 to determine 154 supremacy. Winky would've won decisively and gotten that big pay day.