Teams won't pass on that kind of top level talent for a need unless, the needed player's talent level is at least close to being equal to his.
Teams needing QB, OT's, WR's or Parsons may pass on him because the guys will be at least close enough to his ranking at their needed positions.
Honestly, Dallas probably can't say that about too many players. Most likely he will be rated much higher than Surtain, Farley or any CB. Obviously if Sewell fell that's easy. Slater possibly could justify that pick, but I just don't know how high he'll be ranked by them.
Phillips is another guy to watch. If he clears medicals he could easily be rated high enough to take instead of Pitts.
But if he doesn't, if Slater isn't ranked high enough, if Sewell is gone and it's just the CB's or Pitts, you take Pitts.
Unless, you can get a great trade down option in return.