Frankly, I don't have much hope that Lewis' knee can hold up over a season much less a career. I think Hollins is a pretty good option. He has good length at 6'5" with 33" arms and speed (4.5) and has shown enough to deserve the start with Lewis in the rotation if he is healthy. He was a 5th round pick of Denver's in 2019. Like Floyd who was never really given a shot, Hollins was simply played him out of position as an ILB. Last year on only 34% of the snaps he had 3 sacks, 2 QBKD, 5 pressures, 3 TFL, 1 FF, 1 PD, and 18 solo tackles with 10 assists. You're looking at a possible 8-9 sack type of player if he's the starter. He's solid at the POA, and he can drop into zone coverage as well as rush the QB. That's about all you can ask for at that position.
I like Lewis but if he can't stay healthy it's next man up and IMO that is Justin Hollins who has played well enough to deserve the start.