DaQuon Jones is listed at 6'4" 320 and he does play a bit more of a penetrating style than a lot of NTs do.
Kenneth Grant is 6'4" 331 and is the guy that a lot of Bills fans would love at 30, or after a move up.
I have seen some people say that Oregon DT Derrick Harmon, who is 6'4" 313, might be more of a "Bills guy" in the DaQuan mold.
But, I do think Grant plays more athletically and might be a fit than your average 330+ DT.
So, it will be interesting to see both who is there in the 25-35 range and who the Bills like. Fans that want a bigger DT next to Oliver might want guys like Grant, Tyliek Williams, Alfred Collins, and Deone Walker. But, I am not sure they are the type of DT that fits with what the Bills like.
I also think that a bigger, run stuffing DT that can play two gaps could help the undersized second level the Bills have with Bernard, Milano, and Taron.