I bought a Panasonic 1080P dumb TV a few years ago. Turns on instantly, no apps, no ads, no updates, no tracking. I have no idea what I'll do when it finally dies.
For streaming and playing media from my NAS I use an Nvidia SHIELD TV. It's based on the Tegra X1 so performance is on par with the Nintendo Switch. Really great bit of kit, and of course I can just chuck it out (or repurpose it as an emulator box) if it gets too annoying.