This list looks good. 3 fighters at the twilight fo their careers on the top 5. Damn the talent pool is shallow.
Here would be my top 5. 1. Floyd Mayweather Jr. 2. Andre Ward 3. Juan Manuel Marquez 4. Nonito Donaire 5. Sergio Martinez
I don't understand Ward over Donaire. Donaire has beaten more good fighters (Darchinyan, Marquez, Sydorenko, Montiel, Narvaez, WVII, Nishioka, Arce or Miranda, Abraham, Froch, Green, Kessler, Dawson) and has beaten a higher level of opposition. Darchinyan and Montiel were both ranked P4P when Donaire beat them, whereas the only P4Per Ward has beaten was Dawson, and there is a huge question mark over that win because of Dawson's clear limitations at the weight. I'd also say Donaire has been more impressive than Ward against a similar level of talent. For me, it'd be: 1. Mayweather 2. Marquez 3. Donaire 4. Martinez 5. Ward