On the OL, if either Thuney and/or Andrews leaves, then Dan Feeney, who has played both LG & Center, would be a less-expensive option than Thuney but a more-expensive one than Andrews...Mongo Karras Part 2 wouldn't suck either...
At TE, Hunter Henry is obviously the Big Fish, but a Much less-expensive option for a vet presence in the room who won't demand the football is the Chargers'(again) Virgil Green...He's done the dirty work for the running games in both Denver & SD/LA...
At WR, Marvin Jones, Nelson Agholor...and...Finally...Larry Fitz!
At RB, re-sign James White & Cordarelle Patterson Part 2...
At QB, either Dak, Fitz or Jacoby Brissett...
At DT, first re-sign Guy & Butler, then see about others such as Hankins/Rankins ...
At DE, Matthew Judon & Carl Lawson...
At LB, KJ Wright & BC's own Matt Milano...
At CB, Desmond King, Ronald Darby...
At Safety, Anthony Harris or BC's own Justin Simmons...