5. Not connecting the television to the network often sees the 'smart' feature interfere with normal operation including messages about not being able to check for updates, it being in the list of inputs, etc.
If this is the crux of the issue, then get a recent LG 4K TV with HDR support, like the UH7700 series. Mine isn't connected to a network, and it doesn't complain. I think their OS is webOS, which uses the Linux kernel and a bunch of other open source. The open source is listed in the license attribution screen. All non-portable things in my house connected to a network are never connected over wifi so that I can more easily control the attack surface with a firewall. If it needs a network, it has to be an ethernet port. I still want to get security updates from time to time. I use ethernet for that, and then I unplug it after it's done. Yes, it's a smart TV with unused "smart" functionality.
I don't use their remote normally. I use an old Logitech universal remote, which is helpful for controlling viewing configurations. It's one button to turn on satellite viewing. One button for blueray viewing. One button for Apple TV. One button for turning it all off. I don't need to press multiple buttons to switch inputs and to control their power.