Manny for sure, watching him move up the weight divisions and just going on a crazy run again would be awesome. Just him cleaning out 135 would be worth it.
Pacman. It would be quite fun to watch him demolish everyone and everything from 135-145, in particularly Haney.
I couldn't think of a better man to administer a beating to that weight bully gronk Haney than a prime Manny Pacquiao. It would be ****ing beautiful.