Margartio, I give him number 1 due to his shock victory over Cotto. If Paul Williams hadn't lost to Carlos Quintana the first time then I migh have struggled to choose.
Floyd Mayweather Antonio Margarito Paul Williams Joshua Clottey Miguel Cotto Shane Mosley Carlos Quintana Luis Collazo Andre Berto Zab Judah
Margarito and Williams need to have a rematch to put to rest who is the best in the welterweight division. As long as Margarito does not face Williams, Williams has a legitimate claim to being #1. So he needs to prove he or Williams is the undisputed #1.