Max Valles, Ronald Powell, Carl Bradford, Davis Tull, Marcus Rush, and Stephen Weatherly would all fit our system IMO. Valles should have a decent understanding of our defense since he is in Rex Ryan's defense in Buffalo. The rest would most likely have to start from square one and learn the playbook before they would be productive rotational players.
If we are looking for a player to step in right away and know our system. It is obvious we need to go with Okine, Bates, Mount, or maybe Valles.