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?
My partner and I were gratefully surprised when we bought a cheap Hisense for their cozy space (to isolate when overstimulated and just play some games) that in the setup it offers the option for a ‘dumb TV’ mode with no requirement for internet. In addition you can reject the user agreements and still use the TV. It boots straight to HDMI, no pop up ads, and is snappy.