Shelby Harris
At defensive tackle, the Buffalo Bills have four of their five players at the position set to be free agents. My guess is that DaQuan Jones is probably the one player from last year's team that is a free agent that they make it a priority to bring back. He was excellent in his past two years and is a perfect fit next to Ed Oliver.
However, that won't be the only move and the team will need to bring in other players as they rotate at the position frequently. This means they need at least four, ideally five, players that can play at least of 30% of the defensive snaps at a high level.
The good news with this is that they can look to older veterans because the workload isn't as high. One of those players is Shelby Harris, who just played last season with the Cleveland Browns. He will be 33 years old this upcoming season but was very productive with the Browns as a run-stuffing defensive tackle and pairing him with Jones would be a boost for the position.