I have watched Judo, Boxing and Taekwondo bouts in OL, and with all the safety precautions i don't see how MMA will ever enter except by the introduction of a pure submission round and pure striking round contest. A taekwondo fighter has padded shinbones as well as padded feets. A boxer has padded gloves (NOT MMA gloves!!) and headgear protection. A judo fighters can loose a fight by 2 accumulated mistakes, and only have a 5 minute round and a golden score round.
So based on the idea of a submission and striking contest, each one round ... i would go with fighters like Lyoto Machida, Anthony Pettis, BJ Penn, Erick Silva (whom btw seems to posses really great judo skills) ... in the HW divison i would go with Cain V since the added protection gives his speed extra leverage and his ground skills are very fluid ... if it a bout under the unified rules i would go with Junior Dos Santos. Middle weight will possible be a fighter like Gegard Mousasi.
I doubt a fighter like Jon Jones would be allowed to compete in the LHW division (there would be different weigh in rules)... a guy like Chael Sonnen would be booted out immediately based on TRT consumption, and generally unsportsmanlike behavior and Alistair Overeem would be rejected based on his testosterone based frame alone....
"Better to remain silent and be thought a fool than to speak out and remove all doubt."
DW : Hi .... Stay black!
UH : I ain't got no choice.