I just got a 4k TCL QLED TV from Costco a couple months ago. Have been quite pleased with the image quality so far, but I keep it disconnected from the internet, and only use it with my nvidia shield running the projectivity launcher as the home screen to switch between smart tube, Plex, and steam link.
Not an ad in sight.
https://youtu.be/2Oq2k066A1w