1900-1909 Joe Gans 1910-1919 Packey McFarland 1920-1929 Benny Leonard 1930-1939 Barney Ross 1940-1949 Ray Robinson 1950-1959 Sandy Saddler 1960-1969 Eder Jofre 1970-1979 Roberto Duran 1980-1989 Ray Leonard 1990-1999 Roy Jones Jr 2000-2009 Floyd Mayweather Jr
Minter in London wasn't bad either. Roldan of course (Hagler's only KD??!?! Not IMO) Duran might not be as great a win seeing he was primarily a LW/WW, but seeing as he later won the SMW title it's clear he wasn't out of his depth at MW, and besides, Hagler was slipping at that stage. Arguably beat Leonard as well, regardless of the official result, he competed well with one of the GOAT in most people's opinions. Was ranked fighter of the year about six times by Ring magazine in the 80's I think. Definitely Hagler for the 80's.