Sit and start is relative and league dependent, so consider some of these suggestions more “fliers” and “fades” (note that some are targeted for DFS).
Good luck with your Week 15 lineups.
Renfrow might qualify as too obvious here given he’s an easy top-10 PPR option without Darren Waller, but he’s a must-start against a Browns defense allowing the fourth-most fantasy points to the slot this season. Outside of him and Josh Jacobs, no other Raiders player can be trusted against a Browns defense allowing the third-fewest yards per play at home (albeit dealing with a COVID outbreak).