I think everyone here would take Epperson.
I understand the sentiment that playing behind JT will be a deterrent. However, I believe JT might be capable to play both 4/5 positions. In my mind, that basically means 80 minutes to split a game amongst Black, JT, Epperson, and Finke. Even then thats just the first two years, he'd solidly have the 5 spot for 2 years. Thats not uncommon for bigs. His freshman and sophmore years, his minutes average could easily be 20. Freshman I would assume closer to 10 but I could easily see him playing 15. Finke has been so underwhelming defensively I think Epperson could easily come to the conclusion that PT wont be an issue, ever. The first couple years at 90% of power 5 schools are gonna limit his PT. Heck, even if he wanted too, like someone mentioned early, frosh bigs wont play more than 20 mins a game and his skill level isnt probably there.
This said, I still dont think he comes in, even knowing the odds JT stays more than 2 yeras are slim. We dont have an ideal situation for him, but in terms of PT and potential teammates, I'd give us a grade of B. Factor in our recent run at LaLu guys and this doesn't seem too crazy. Being an international player, I think at least making the tourney this year, would go a lot farther with him, than other domestic products.
Personally, I'd take my chances with Tilmon and Epperson down low and grab a 5th year PG. If Groce is serious about playing decent minutes with two PG's, we are gonna need a third, and JCL/Demonte aren't that.