Since everyone will likely give you varied answers I’m going to recommend this list from Protondb.
You can also see what Valve recommends here for another good batch of games.
Me personally, I’ve had great luck with Indie games, Story heavy single player games like Dispatch and for multiplayer, I can guarantee that Helldivers 2 works.
Yes. The absolute worst is in the lobby at a doctor’s office. It’s quiet and then filled with whatever video stream they decide to play.
I’ve started carrying my headphones with me to drown out those situations, especially if I know it’s going to be a long wait.