There are only three guys in my opinion who have a legit shot to unify a division, that's Floyd at 147, Pac at 130, and Wlad at heavy.
Pac doesn't own any belts right now, but if he were to fight JMM again, whoever won that fight would be undisputed at 130, I don't care if a couple other fighters owned some joke belts.

Taylor was undisputed champ at 160 when he beat BHop, but he's been stripped of a couple titles. I don't see him unifying again because he'll probably be at 168 before too long.

I'd like to see Rafael Marquez take a shot at unifying 122.