@gsuberland x86 Debian box + dumb LCD panel + VLC / Firefox + uBlock seems to be the way to go these days.
You couldn't pay me to buy a smart TV.
@gsuberland A friend of mine has seriously looked into starting a business of "neutering" smart TVs.
Open it up, completely remove the motherboard. Keep power supply and panel, replace the electronics with an FPGA that just takes HDMI/DisplayPort in and drives the panel.
Then resell it as a dumb display.