I recently purchased a 65" Vizio from Walmart for pretty cheap and paired it with their Onn 4K Android TV box. Kept the TV disconnected from WiFi. It works pretty good but the TV liked to nag about not being connected so I created a hidden guest SSID that had no internet access and connected the TV to it to make it shut up. All in all it's not a perfect solution but it works and no ads like Samsung TVs.