Ok hear me out.... Steam deck and the dock. 4 8bitdo controllers and a Logitech wireless kb/mouse combo.
Use Firefox as a non steam app for Plex, Spotify, streaming site of choice etc....all the artwork is available. Spend a few minutes to map the controllers so you can use them on those non steam apps and you're golden.
This is the setup I have and it works pretty well. My family got to grips with any little annoyances pretty well.