I think the Pack have to look at CB. Perhaps sign a free agent running back but I really like Noah Herron too. I think he can be a good 3rd down and change of pace type of player so I'm not sure we take a RB with our 1st round draft pick. I think CB and OL are more likely but it's December and TT has surprised us before.
I like Herron too. He's been good when we needed him to step up, and he's a good blocker. He gets yards when we need them too, so it's not just his blocking I like. I think of the 2 times he started, he got 100+ yards once and 99 yards the other time.
I'm content with Wynn too. Get this guy in shape and he'll be a very solid #2 back. B-Jack looks like he has potential as well.
I really think that an RB would be a wasted draft pick. We have real needs. We need OL, CB, S, TE, but like you hinted, CB and OL are our pressing needs.