Khabib really does have an incredible wrestling background despite not competing since the schoolboy/cadet level. In addition to his wrestling coach and training partners in Dagestan being world and Olympic champions, he is basically training at a Regional Olympic Training Center in AKA. The last video posted showed Khabib in the same wrestling practice as Shawn Bunch, Deron Winn, and Boris Novachkov. And then we know DC, Cain, etc also train.
Having said that, Novachkov did an interview claiming that he has thrown/outwrestled Khabib in practice. Novachkov is an Olympian and NCAA DI All AMerican. If this is what it takes to hang with Khabib wrestling-wise we can only look at guys like Gregor Gilespie in the UFC who should be able to do the same. After Gregor there are other guys with strong wrestling backgrounds like (though not on Gilespie's level) Tony Ferguson, Justin Gathje, Kevin Lee, and Drakkar Klose, Desmond Green who is a bit undersized for 155 IMO, and then the one other guy who can match Khabibs background and might even have better wresting. Im talking about Rustam Khabilov. Problem is, they grew up together and we don't know if theyd fight. Prime Gray Maynard would've also been an interesting style match up.