+1 for the Nvidia Shield and LineageOS route. Keep in mind that LineageOS doesn't work with some proprietary features on the box such as:
Dolby Vision
AI Upscaling
Although this hasn't really bothered me. This solution is basically set and forget. Is stable enough to leave at my parents house with almost no complaints.
Also another weird usecase... I use these nvidia shields for my LAN parties as thin clients.