Who are the top 10 ww's since 2005??

[Phenom]

PACs No1. Don't know who's no2 onwards.
Off top of my head PACs beat cotto, Bradley X2, Thurman, broner, Lucas, rios, dlh, ssm, clottey, jmm.

Pacquiao has 4 losses at WW arguably 5

[hugh grant]

Pacquiao has 4 losses at WW arguably 5

Losses don't matter. There are a millions reasons why a fighter loses, and a million reasons why a fighter don't lose. .
And rarely is it because they aren't good enough or they were too good in the case of a fighter not losing
Pac s greater than everyone he ever lost to