This is how I see Dallas having each position rated. Top 5 for each. All my opinion from edumicated guesstimates.
Johnny Manziel (despite the reports otherwise)
Blake Bortles (Most NFL ready)
Tom Savage (high ceiling, very coachable)
Jimmy Garoppolo (resembles Romo in more than just the school they attended)
Aaron Murray (his injury was all that kept him from a 1st round pick)
note : I don't think they rate Bridgewater until 7th behind Carr.
note : off field issues and the inability to catch out of the back field left some of the top guys out.
Eric Ebron (should be drafted between or right after Watkins and Evans, easily the 3rd best receiver in this draft)
Zack Martin (heads above all other guards available, may be able to play RT, but would be All Pro if left at G)
note : Mathews has more potential, Robinson will play at NFL levels immediately but may never get much better.
note : A weak center class. Some guards may be looked at as centers due to this.
note : Beckham does not have the size Dallas covets in their receivers.
HaSean Clinton-Dix (better fit as single high)
Jimmie Ward (his size may be all that kept him from being #1 S on Dallas' board)
Calvin Pryor (he fits a position that is log jammed, SS)
Jonathon Dowling (best FS prospect in the draft, character concerns)
Justin Gilbert (size, speed, instincts)
Jason Verrett (this years Richard Sherman?)
Stanley Jean-Baptiste (his measurables are undeniable)
note : some of the other top guys didn't make the cut due to size concerns
Chris Borland (just makes plays, reminds you of a less athletic Dat Nguyen)
Avery Williamson (the best cover ILB in the draft)
Glenn Carson (extremely smart, makes all the defensive calls)
note : ILB may be the weakest position of this draft. After Mosley the talent drops considerably.
Ryan Shazier (best pure 4-3 OLB prospect in a few years)
Kyle Van Noy (best coverage LB in this draft)
Jordan Tripp (would be limited to SAM in a 4-3 most likely, but athletic enough to play anywhere)
Christian Jones (failed drug test?)
note : I left out anyone that would play as a DE for Dallas' 4-3 scheme
Khalil Mack (a higher ceiling than Clowney)
Jadeveon Clowney (takes plays off, needs coach motivation, but best athlete in the draft)
Anthony Barr (boom or bust)
Dee Ford (best production against tough competition, undeniable edge rusher)
DeMarcus Lawrence (physical skills, needs to learn more)
Aaron Donald (if Clowney is the best athlete, Donald is a very very close 2nd)
Timmy Jernigan (His production is impressive, position versatility, 1 tech, 3 tech, DE)
Dominique Easley (injury concern appears nullified.)
Louis Nix (best pure nose in the draft, maybe in years, he is athletic enough to be very effective as a 1 tech in a 4-3)
Kirby Van Der Kamp (just barely edges out Leone, mostly on experience)
Richie Leone (over 50% inside the 20, over 20% inside the 10, and only 3 touch backs)
Cody Webster (Ray Guy winner)
Cody Mandell (47.5 average nationally, good for 2nd)
Pat O'Donnell (25 years old, but the second coming of Mat McBriar? love me an Aussie kicker!)
Chris Boswell (booming kickoffs, but lacks long range FG ability)
Cairo Santos (mighty mite, 5' 8", with a monster leg. over 65% touch backs)
Nate Freese (has had the most team visits)
Toss two other names here randomly
There you go. 3 hours before the draft, this is how I see the positional fits for Dallas.