I'm going to throw out a couple of dark horses and one who I don't think is going to factor in next year...
I'm really intrigued by Alston and Rogers. I love Alston's size which seems the most proto-typical for OLB, and I think that Roger's lacrosse experience (speed, balance, hand/eye coordination), when coupled with a year+ in the weightroom, could help him become a factor. It's Jurgens who I don't think will be a factor. I think that his injuries the last two years coupled with the amount of weight/strength he needs to gain to play the position, and his inexperience at the position are too much to surmount in 8 months. I think it's 2020 for him.