Just read an excellent write-up on Corn Nation, and their thought was you'd want Peyton Newell or Jaylin Barnett to be our NT, with the Davis twins as the DE's. They didn't seem to know what you do with Mick Stoltenberg and DaiShon Neal, because they're both really tall for a standard 3-4 system. The problem is, they are big dudes, so you'd probably want to use them at DE as well. And yeah, the NT isn't going to just eat up space, they have to constantly demand double-teams by shifting exactly right between the center and whichever guard they take. In one sense its easy, in that it doesn't require a ton of technical knowledge, but on the other hand, the player has to be extremely quick and extremely strong. If he can't demand a double-team, the rest of the scheme doesn't work as well.
They were thinking guys like Thomas and (hopefully) Daniels will make excellent NT's going forward, but for 2017 its anyone's guess as to who they will fit into that role.