Now that Pacquaio is retired who is the best welterweight?

Thurman, Brook, Bradley, Khan, Vargas, Porter, Garcia

 

Bradley still. Has the better wins than anyone else. Brook can't keep living off the Porter win. Porter isn't Marquez or Pacquiao. He was merely a beltholder.

Plus, Bradley fought Rios, something Brook was unwilling to do.

 

Do people honestly believe Brook avoided Rios, an overweight one dimensional fighter.
Rios is taylor made for Brook, walks forward in straight lines using his face as his defence, perfect for Brook's left jabs and straight rights, easy win.
People will say 'but Brook wanted a rematch clause', thats not uncommon.
Think why, Rios uses his head bit like Porter which caused a cut to Brook, so he could lose title due to stoppage from 'accidental' head clash ( plenty of title fights have been stopped like that ) so get rematch clause just in case.