My parents are getting a new tv, and are asking for recommendation. I think all I can influence is the brand/model (not realistic to propose rpi and more complex systems). I instinctively avoid google/android and lean towards anything else open source, so probably LG WebOS… But I had bad luck searching for more detailed comparisons. Maybe you have experience or opinions?
Better choice may be to connect it to the Internet but use a pihole to block all the BS (ad domains and telemetry domains). The fact is that you often get the best HDR picture quality with the native streaming apps. Also you’ll at least want it hooked up to the local network to stream content locally, if you have any.