Dabo may or may not be a great position coach or even great coordinator. IMO, being a great head coach does not require that. Though he has a large budget, there are many schools with equal or better resources at which coaches have failed to appear in a National Championship game. Clemson wasn't exactly Texas, USC(w), or Alabama when Dabo took over in '08. What he has done as a CEO/head coach and his ability to bring in the right players and assistant coaches is pretty awesome. Head coaches must be able to do more than just coach, and the other responsibilities are probably a good bit more important than his actual coaching/instructing ability as a HC. Hiring "good fits" with the right schemes, personalities, recruiting ability, and instructing ability is not an easy task at any school.
CPJ is a great coach and has put together a great run at GT. He is in the minority in CFB in terms of being his own offensive coordinator and play caller. He has fielded some great offenses, but as the head man--his responsibility extends much further past fielding a great option offense. He has been a good HC, but if he were to somehow get an elite or heck, even an above average defense on the field every year he would be a much better head coach--even though our defensive success has little to do with his own coaching ability.