Just for the sake of discussion:
This is the best group of corners to come into the league in a long time. We could have 7-8 go in the first round, and perhaps 15 in the first two. There are tall corners, man corners, slot corners, and zone corners. There are top ten talents at the position who might fall to the 2nd round, and that almost never happens at this position. Any team that wants to upgrade at corner should be able to just by using a pick over the first two days.
2) Tight End
Jake Butt's injury stings a bit, but there are still 6-7 guys who could go in the first two rounds. It wouldn't be surprising if a full 1/4th of the league's starting tight ends in 3 years come out off this class. Guys like David Njoku, Bucky Hodges, and Adam Shaheen have the talent to be absolute dynamos.
Another year, another good group of edge rushers, led by Myles Garrett and Soloman Thomas. In a weaker class, guys like Derek Barnett, Taco Charlton, and Charles Harris would be likely top ten picks.
After several down years at the position, there are at least three rare talents in this class, and another 3 guys I peg as potential future Pro Bowlers.
5) Running Back
There are two guys who seemed destined to be stars with Fournette and Cook, another guy in McCaffrey who has a rare and valuable skill set, two more in Mixon and Kamara who have everything you need to be great, and another half-dozen guys who will be heavy contributors in the league, at worst. It's probably the best group of running backs since maybe 2010.
6) Defensive Tackle
It's not a great year for interior linemen/five techs, but there are a few exciting ones headlined by Jonathan Allen. There are also a bunch of interesting talents like Malik McDowell, KPass, and Caleb Brantley. It's an okay class, not a great one. If you take Allen out of the mix it's downright bad, but IMHO he's one of the best DT prospects to come along this decade so ya gotta give it a bump.
7) Non-Rush Linebacker
There's a special inside linebacker in Rueben Foster and a couple of first round caliber 4-3 outside guys in Reddick and Zach Cunningham. It's a pretty typical mediocre class as the traditional "linebacker" becomes less and less prominent in college football's spread wasteland.
Feeney and Lamp look like first rounders, and Dorian Johnson from Pitt SHOULD be (love the guy.) Ethan Pocic elevates the centers and Elflein will be a nice pivot for a ZBS team. Otherwise it's a meh group that lacks a Zack Martin type.
There are three guys considered to be eventual NFL starters, and potentially very good ones. You know their names. There are another 2-3 guys who at least one GM will fall in love with and draft in the 2nd round with hopes of developing. It's honestly better than last year's group, remembering that nobody knew about Dak Prescott then. But while there might be a Matt Stafford to had, there aren't any generational prospects. The highest ceiling and lowest floor both belong with Kizer. Watson has real talent but has consistency issues. Trubisky doesn't have much tape. Pat Mahomes might end up being the best of them, but not until 2019 or so. And Davis Webb has a lot of fans too.
10) Wide Receiver
No Amari Coopers here. Mike Williams has everything necessary to be a true #1 NFL wideout and may get overdrafted because there aren't any other guys like that. Corey Davis is very interesting but he's a huge gamble. He's another guy who should probably go late in the 1st or early in the 2nd (a la the very similar Brian Quick), but he'll probably go top 20 because of the lack of talent. John Ross has speed for days, but little size or health, and will either be a #2 for a team with an established star, or a Tyreek Hill type. Otherwise there are a bunch of guys who look like #2 and #3 NFL receivers to me. I wouldn't be on anyone else in this class becoming a superstar.
This might be the worst group of offensive tackles I've ever seen. No joke. I'm a fan of Ryan Ramcyzk, but he might be the only clear starting NFL left tackle in this group. And frankly, I don't think he's better than Taylor Decker, who was the 3rd tackle off the board last year. I don't think Cam Robinson, with his lousy technique, is a tackle at all. At least not yet. Garrett Bolles has real talent, but he's a 25 year old one-year starter with character flags. After that, the cupboard is bare, and we'll see guys carrying 4th round grades like Roderick Johnson going in the 2nd.