I have a 42” tv from this cheap brand i found in MediaWorld in italy (i guess it’s called MediaMarkt in Germany and Switzerland): it’s called Ok.
It’s just great. Besides decoding digital tv it does essentially nothing.
If i want smart features i plug in an amazon fire stick.
I had it for six years now, i still love it.
One of the supermarket chains here have their own line of TVs. They are dirt cheap, absolutely fine quality. Some of them do run Android, or GoogleTV, so you'll get whatever tracking that may yield, but they certainly don't have the resource or infrastructure to run their own separate tracking and spying on those units.