This certainly is a deep class when it comes to the front 4. My personal favorite is Ogbah, but I'd be happy with Rankins, Reed, Spence, Billings, Butler or Nkemdiche.
Ogbah is my choice because I believe he has position flexibility which is important in a Ryan defense. He can play OLB in a 34 or DE in a four man front. The kid is 275lbs and runs an amazing 4.6 as that weight. I love the way he disengages off blocks too.