Greatest 140 pound champion of all-time

[1SILVA]

The junior welter division has been one of the most underrated divisions ever. Of the followng five fighters, who do you feel was the greatest 140 pounder?

Barney Ross
Aaron Pryor
Julio Cesar Chavez
Antonio Cervantes
Kostya Tszyu

Feel free to add or subtract those fighter you feel belong on this list