Playoffs Week 15 Help at QB

Who would you go with Week 15.

Alex Smith vs Chargers (he has played well vs Chargers)
Mariota vs 49ers (he has been so unpredicatable)
Tyrod Talor vs Dolphins (if he is healthy)
Carr vs Cowboys
McCown vs Saints in New Orleans

I clinched a playoff spot and I am locked in at 2 or 3 and want to make roster moves this week. Am I over thinking this…Thanks!!!