I like Wentz a lot from what I've seen, but it's hard to get a true bead on him because I never get to see him play. I'm going to have to do most of my work on him after the season.
There are a few guys that I've seen quite a bit (enough to feel confident about my evaluation), and I'd rank them:
Top Tier (Franchise QB potential)
Goff, Cal
Cook, Michigan St
2nd Tier (Has potential but not for everyone)
Kessler, USC
Hackenberg, Penn St
Sudfeld, Indiana
Wilson, Utah
3rd Tier (I wouldn't draft)
Kiel, Cincinnati
Jones, Ohio St
Hogan, Stanford
Boykin, TCU
Prescott, Mississippi St
Then I have another group of guys who I like for tier 1 or 2 but just don't have enough yet to say for sure:
Wentz, North Dakota St
Lynch, Memphis
Doughty, Western Kentucky
Frohnapfel, Massachusetts
Towles, Kentucky