I think Marquardt has the best chance of making a comeback, Koscheck isn't training at a top camp to my knowledge and IMO hasn't shown any improvements in years. Maynard's chin seems to be the weakest, I picked Marquardt because he got KOed by huge power punchers so his chin might not be bad like Koscheck's or Maynard's and he is training with top guys.
"All I guarantee is Violence" Wanderlei Silva
HW Fedor, Mir, Cormier
LHW Wanderlei, Shogun, Alex G.
WW Diaz, Lawler, Kampmann
LW Gomi, Pettis, Alverez, Khabib N.