Don't agree with the order for your top 20 but that's good list. You just need to add Ellenberger imo, good wrestling + KO power at WW = good prospect.
I see JDS above Cain at this time but they're close to each other.
Khov, Big Nog didn't ragdoll Randy stop this non-sense. He swept him on the ground a couple of times and that has a lot more to do with BJJ than wrestling. If Cain TDs him he'll most likely be swept too but he wont get out-wrestled by Big Nog (get TDd or have his TDs stuffed). No way.
And since when does good wrestling + good striking = being one dimensional? AJ isnt a one dimensional fighter.