For 5 years I have been saying to sign Zach Brown. The only LB that has 4.4 40yd speed, hands like a DB, and has the stats that prove he is a football play maker.
If healthy, I would bring Martellus Bennett back to Dallas in spite of Jason Garrett and his stupid brother that is long gone. Bennett is the only TE that can line up out wide like a WR and come inline and block like a OT.
Eric Ried is basically Zach Brown at FS. He had some injuries but has had time to heal up and is the only true freshman to start a S in LSU history that included Honey Badger, Claiborne, and Peterson. But he will not be a Cowboy as he will protest injustice.
You add these players plus draft picks, then you prove you want to win Super Bowls.