In terms of mainstream attention. Is it: Holmes-Cooney Leonard-Duran I Hagler-Hearns Leonard-Hagler Tyson-Spinks Holyfield-Tyson II etc.
Well I think Hagler-Leonard was pretty big I remember even my parents watched that! I think once you get into the 90's it goes to PPV and the exposure to the public is more limited, although both Tyson v Holyfield fights must be front runners since the 90's.
Tyson/Spinks Holmes/Cooney Hagler/Leonard Hagler/Hearns Honorable mention for more recent times. Trinidad/DelaHoya. It was pretty big for its time. The fight itself sucked and that probably turned off alot of mainstream sports fans who couldve become boxing fans.