Floyd Mayweather Jr Kelly Pavlik Wlad Klitschko Cash cows if I've ever seen any. Although personality-wise, I'm sure Floyd is a difficult man. The other 2 would probably be ok.
I would also like to manage an up and coming prospect with endless potential, so in that regard, I would go with either Lee, Povetkin, Gamboa, or Solis.
I knew you would take these two cubans. Good choice, they will make huge amounts of money. Instead of Taylor I would take Klitschko to have some huge income right now.