Leonard-Hearns 1 Jones-Toney Sanchez-Gomez Chavez-Taylor DLH-Mosley 1 Spinks-Qawi There's plenty of examples.
Sugar Ray Leonard vs Roberto Duran 1 Evander Holyfield vs Riddick Bowe 1 Oscar de la Hoya vs Ike Quartey Félix Trinidad vs Fernando Vargas
In recent years, even though these two aren't anywhere near the level of the guys I've mentioned... Taylor-Prograis.
There's one example here I'm not sure about: DLH-Quartey. I think Ike was actually a bit past his prime when he fought Oscar. The Quartey of 94-96 was better than the 99 version Oscar fought.