If Floyd Mayweather came out of Retirement who would you prefer to see him fight?

He's never coming out of retirement but if he did it would have to be Pac. They have unfinished business. But why he'd never come back, there's a huge black cloud over him from the IV Gate incident. Everyone would ask for VADA which is like the black plague for Floyd. There's no way he'd fight anyone w/o USADA in his back pocket and a stack of retro active TUEs in hand.