The Arguello of Nov 2 1982 I believe beats everyone listed above. Duran excluded. Bradley?? Come on Comparing Postal to Arguello?? Come on. The Arguello of that night beats everyone and would have beaten Pryor if he wasn't pumped up with some form of drugs
Mamby had a tricky style,good movement, a sharp right hand, sound defense, and a chin made out of titanium. I think he gives Arguello bags of trouble. Bumphus and Curry get starched, I think.
Barney Ross was a legit Jr. Welter titlist, and fought in low 140's as WW champion. Carlos Ortiz who moved DOWN from 140 Champ to be a legend at Ltweight. Plus Henry Armstrong could have made 140 lbs. So many great matchups for Alexis.
You might be right. I would pick Duran to beat him, but you said 'since November 1982,' and Duran was up at light-middle by then. Of those who remain, I would give only Whitaker a decent chance. And a small chance to Mayweather, too.
Edwin Rosario hit harder than Duran. He's at the top of the discussion for the most powerful 135 pounder ever.