I don't know about that. The best MMA guys are strikers at the moment.
Not only is your post non-responsive it’s also inaccurate.
Heavyweight: NCAA Wrestling Runner-up and US Olympic wrestler
LH: See above (Cormier is still LH Champ) but Jon Jones was state champ high school wrestler and JUCO national champ as well
Middle: Robert Whitaker is well rounded MMA. Won AUS National Wrestling Tournament in 2015.
Welterweight: Tyron Woodley is 2 time NCAA All American (top 8 in USA) wrestler
Lightweight: Khabib is multiple-time World Sambo (Russian submission wrestling) champ
Featherweight: Max Holloway the only pure striker on the list of UFC champs
Bantamweight: TJ Dillashaw is a 3 time wrestling NCAA qualifier
Flyweight: Henry Cejudo is Wrestling Olympic Gold Medalist