I like how GSP is classified as a wrestler.
5/8 of the champs use wrestling offensively (5/10 if you count Barao and Rousey) to some extent. Calling it the dominant fighting style is silly.
If it were the dominant style world-class wrestlers would "dominate" every division. 0/10 of the champs are world-class wrestlers and that isn't even debatable really....
It is very difficult for people to grasp the notion that a fighter can be prominent in one fighting style when we are talking MMA, the very definition being MIXED martial arts. However it is a fact.
Since GSP considered wrestling in the Olympics, I think, adds some legitimacy to him being classified as a wrestler. Henderson really began his fighting career in highschool and college as a wrestler.
The thread is interesting because the ongoing discussions revolving around best fighting styles is a classic and given the current division champs, it's a great time to bring it up.