1. Canelo Alvarez
2. Manny Pacquiao
3. Amir Khan
4. Danny Garcia
5. Timothy Bradley (just to see Bradley lose one!)

I don't think there would be any other selection of fighters worthy of a Mayweather fight. You may wanna throw in a Devon Alexander and/or a Lucas Matthyse, maybe even a Lamont Peterson- but, really, would you wanna see any other selection of fighters between 142 and 154 that you would wish to see Mayweather matched up against?