I just use a small little PC (no NAS) to stream content from the internet. For local, over the air broadcasts, I use a Hauppague external USB dual tuner that has been rock solid for years.

The PC controls everything using a gyro/air mouse. The only thing the big dumb TV provides is a HDMI display. No mess, no ads, no injected content, no spying. I have full control of what I choose to see --- sports, movies, etc.. You would be hard pressed to name something I can't get.

https://www.amazon.com/Wireless-Control-Gyroscope-Learning-P...

https://www.amazon.com/Hauppauge-WinTV-DualHD-Tuner-Windows-...

https://www.dvbviewer.com/en/index.php