The one guy not mentioned here is Aeneas Hawkins. He would likely be the "project" at this point since he's ranked in the 300's, but his offer list says otherwise. If the Buckeyes can get Vincent and Hawkins, and pull in Jones (who could play on either line), I think that would be an extremely successful cycle at DT.
Jones is similar in size to a Billy Price, coming out of HS. People forget he was initially recruited as a DT, with measurables that would indicate a perfect fit at NT. Jones is the same way. If the OSU staff really thought it was necessary to have a NT in this defense, they would plug in a guy like Price at the nose and not even try to move him around. Obviously they haven't felt the need to do so, and the results have shown them to be correct.