Patrick Surtain Jr. - Cornerback
The Denver Broncos are not a good team and with Sean Payton taking over this year as head coach, he will probably want to begin rebuilding the roster with his "guys". Surtain is still on his rookie deal and wouldn't be too difficult to find a way to get his contract under the Bills salary cap. Surtain is one of the best corners in the league and is only 23 years old.
The one probable issue is if the Broncos would be willing to trade away their best corner, possibly their best defensive player. He's a player that Coach Payton would probably want to build a defensive roster around; however, with the right offer, the Broncos might bite, given all the holes on that roster and the lost draft capital to the failed trade for Russell Wilson.