but in all honestly, titles dont mean so much anymore. I'd throw Duran in their and Pacquiao. They didn't have a lot of fights at the weight, but it's clear they were monsters during that time and weight class.
Pacquiao smashed Cotto, Clottey and Margarito, the little weight discrepancies shouldnt change things. Pacquiao was 148 lbs when he merked Marg. 149 when he beat Cotto, and 149 when he beat Clottey. 147 when he Beat DLH.
The Duran that beat SRL was in peak physical shape. He looked like the LW Duran. Pit him up against anyone at WW it's hard to see him lose.