An underrated one i never see mention is Edwin Rosario vs Jose Luis Ramirez 2, it was basically Tommy Hearns vs Marvin Hagler but it was even better. The 1st round as i remember it was a classic.

Also some other underrated ones.

Matthew Saad Muhammad vs Yaqui Lopez 2 Round 8
Marvin Johnson vs Leslie Stewart 1 Round 1
Wilfredo Gomez vs Lupe Pintor Round 3
Bob Foster vs Frank DePaula Round 1
Floyd Patterson vs Ingemar Johansson 3 Round 1
Caveman Lee vs John LoCiero Round 5
Larry Holmes vs Tim Witherspoon Round 9
Kelvin Seabrooks vs Thierry Jacob Round 1
Terry Norris vs Troy Waters Round 2
Acelino Freitas vs Jorge Barrios Round 11
Kevin Kelley vs Troy Dorsey Round 11

Some underrated ones there be sure to check them out.