was? You can add add ons, like Thomas Hearns, Wilfred Benitez, Mike McCallum, Donald Curry, Aaron Pryor, Hector Camacho, Sanntos Laciar and Alexis Arguello, if you want to.
Hearns has just got to be on there, he was a cheat code at light-middle outboxing Benitez with a damaged right and utterly pulverising Duran.
I went with Michael Spinks. Dominated light heavy then captured lineage at heavy. Never saw a knockdown until he ran into Tyson in ‘88. Went 14-1 in title fights and 6-1 against HOF men. All between 1980-1988. To be fair I can see arguments for other men on that list
Duràn's career did slip at the 80s but he became 3-time world champion,also got the comeback of the year award twice.
I think long time champions Jeff Chandler and Eusebio Pedroza could be on this list. Also, the somewhat forgotten Carlos Deleon, he was a world champion for all or part of every year of the 1980s.