Looking at the responses here and I can easily draw the conclusion that a most sherdogers never wrestled greco roman before. Greco Roman wrestlers are generally stronger than their counterparts in freestyle wrestling, every move is a power move basically, every throw, every roll from the parterre, every lift.
Dan Henderson was a greco roman wrestler, who made up for what he lacked in technique with brute strenght and an incredible grip.
If Jones and Hendo where going straight greco, Dan would beat him hands down, easily. Just because you get taken down in MMA doesn't mean you are not a great wrestler, a lot of the takedowns in MMA happens in the transitions and even the best guy can get taken down if he is lunging in with a punch and the other goes for a takedown, it's all about timing.