This was the approach I took when purchasing a TV. Getting a TV without a microphone and Wi-Fi connectivity is borderline impossible... in the consumer segment.
My living room is now furnished with a digital signage monitor and a soundbar.
The price was a touch more than a normal TV of a similar size, and there was not much variety (I had to give up on OLED at the size I wanted for example), but I just have such a hatred for the constant nagging for Wi-Fi and terms of use acceptance nags my parents' new TV had.
If your product is cheaper because you sell my data to the highest bidder, just let me outbid them please.
What TV? I ended up getting a cheap Sceptre since it didn't have any smart nonsense. Not the greatest picture in the world but that's okay
I connected my TV to the internet when I set it up (also, turned off microphone ad tracking which is deep deep in settings), then connected it to an AppleTV and cut the internet to the TV at the router. I can switch it if I need to, but never have in the year since I purchased the TV.