Is the list made up of those who mainly fought at feather or anyone who ever fought at that weight?

My list includes those who atleast won a title at 126.
1 Salvador Sanchez
2 Wille Pep
3 Eder Joffre
4 Alexis Arguello
5 Sandy Saddler
6 Azumah Nelson
7 Jeff Fenech
8 Vicente Saldivar
9 Erik Morales
10 Manny Pacquiao

Honorable mention
Marco Antonio Barrera
Davey Moore
Prince Naseem Hamed
Juan Manuel Marquez