Mighty Mouse wrestled in highschool, and it appears he may not have attended college(given that he started fighting at 20-21 years old)
Cruz has extensive training in amateur wrestling, as evidenced by the fact that he virtually outwrestles everyone he's fought.
RDA may not come from a wrestling background, but he does come from a BJJ/Judo background, and has transitioned into wrestling since entering MMA
Lawler is the quintessential wrestleboxer, with kicks. It's not his primary base, but he did wrestle prior to his fighting career
Out of that list only McGregor and Werdum come from backgrounds with virtually no wrestling. There's more to wrestling than constant power doubles.