Transitioning from college to the Pros with only a Power Bull rush is tough as we learned with Keion White. Moore has more speed and bend than White. Parker might be the best compromise (outside the top guys) as he has some speed, some bend, but still is good defending the run.
It will be interesting how far Barham drops, he has a lot of quickness and is a late bloomer so he has room to grow. I think Barham is a OLB in the NFL (a little small for DE) and the transition might take a bit of time, but if guys like Barham and Kanak fall enough, they are great athletic high upside picks in the 6th or 7th.