Anybody likely to make a big impact in MMA looking to transition from wrestling, muay thai, jiu jitsu, judo etc. Jordan Burroughs, Kyle Snyder, Kyle Dake could make serious competitors in MMA if they choose to fight MMA.
Check out my thread on Damian Janikowski. 2012 Olympic Bronze medalist in Greco and 2011 at world. Definitely one of the better MMA prospects outside of the UFC or Bellator