check out commercial tvs (vs consumer). because they're used for signage, they tend to have fewer "smart features" and better privacy/security. you can often find them used.
If you thought "smart" tvs couldn't get any shittier: https://arstechnica.com/gadgets/2024/02/walmart-buying-tv-brand-vizio-for-its-ad-fueling-customer-data/
Honestly, I just want a DUMB tv at this point. Don't show me a damn thing unless I install it.
Discussion
Cost more for less features, but 100% worth it for better privacy and reduced attack surface.