Tom Szczerbowski-USA TODAY Sports
This is the closest category to judge, as both men come from a wrestling background.
Tito Ortiz made a career of using his wrestling to control opponents and score points with his ground-and-pound. The reason he was able to remain champion for so long (other than the fact he beat more middleweights than light heavyweights) is that he could use his explosiveness to secure the takedown and not let up the pressure.
Of course, his cardiovascular shape also guided him from the frantic pace he set from top position. Add the fact that he is very physically strong, and Ortiz has wrestling that needs to be game-planned for and avoided.
That being said, Jon Jones is also a very high-level wrestler. What sets Jones apart from the rest of the people in MMA is that he has adapted his wrestling style into an MMA style that makes him so effective.
He can grab a takedown from weird angles, as his length, quickness and explosiveness are a mathematical equation that leads to a takedown.
From there, he drops his ruthless ground-and-pound attack. The style has yet to be duplicated, and that's why he's so successful.