He's the best stand up fighter in the world between 185-205 lbs.
Anderson Silva? Out in a coma in the first round.
Saki? Good boxer but can't handle clinch/elbows.
I think Corbett is the most impressive kick boxer at the heavier weight classes. Outside of the fluke KO by Alex Roberts he really has looked unstoppable. He will probably retire as the most dominant Muay Thai fighter in the heavier weight classes.