In boxing, it's too hard to predict what will happen fight to fight, so there's no telling who are going to be the most competitive fighters a couple/few years from now, but I'll give it a shot...
- Manny Pacquiao (even if he loses three or four more fights I want to see this fight happen; I don't care any more but I had anticipated it for so long I just want to see it)
- Adrien Broner
- Canelo Alvarez
- Danny Garcia
- Timothy Bradley
This is not in any type of order. I'd like Broner to be his last fight because that's where I see his greatest (only) chance of taking an L, and that's only because Floyd will be at the end of his career by that time and Broner will be closer to wherever he's going to peak.
To be honest though, with the type of financial difficulties Floyd has shown to have had in the past and his clear love for the spotlight and his last "retirement", there's no doubt in my mind that he'll be fighting into his 40s.
Lastly, I hope he loses, not because I have anything against Floyd (because I don't want the Coli Floyd Coalition running up on me), just because I love to see how great fighters come back after taking Ls.