Height is not nearly as important for DTs. It actually helps with pad level and getting underneath Interior Olinemen Honestly if they are shorter, more twitchy, and have long arms, that would be ideal.
2020 DT Jalen Carter would like a word, the 6'4" 300lbs DT/SDE/TE offers un parallel flexibility. An this is what Manny wants in his dline; big long athletic types that get into the backfield quickly while playing the run on the way or stop an have the length to knock down a pass.