Something I would quite like are coop games that don’t require anyone else to buy the game. Keep talking and nobody explodes works well for that, can have more people too as most of it is communication rather than control inputs but only 1 person is holding the mouse/controller.

I have a steam controller and can stream my PC to the TV with steam link. Apparently some games can be played with multiple controllers but I don’t have any others and they don’t make steam controllers any more. Not even sure how well that even works on Linux as it is something I have never tried.