I think Roquan is the obvious choice. He was snubbed last year but he still showed that he was one of the league's premier inside linebackers and he is only going to get better at his age (25).
Smith has emerged as the Bears' best player and he's coming off another impressive outing in 2021. Last season, Smith totalled 163 tackles (4th in NFL), 12 tackles-for-loss (4th among linebackers), 27 pass tackle stops (1st), had a 3.6 missed tackle percentage (2nd) and a 76.8 passer rating allowed (7th for LBs).
I like Infante's take on both Jaylon Johson and Teven Jenkins as well. I believe that both these guys could be posied for a breakout type of season. Jenkins was slowed down due to injury but he has all the potential in the world. As for Johnson, we know how good he is. With the additional help in the secondary surrounding him and the addition of a solid, defensive-minded head coach in Matt Eberlus, he could be in line for a MONSTER season as the CB1.
I think Robert Quinn will also have a shot at another Pro-Bowl selection since he was virtually unblockable last season.