After the news about Tavius, Khalil Mack would be a great addition. But cap space remains the problem.
Quenton Nelson, Vita Vea, DeForest Buckner, Khalil Mack, or maybe even Derwin James (depending on how serious Hawkins’ injury is) would be good additions.
I would be cautious of adding Derwin James though; that’s A LOT of money in the safety room.