For all televisions which do not feature a high level of functionality without using another device. These TVs usually have a basic GUI for changing settings, picture, calibrating channels, or playing media files off a USB drive. OSes will likely almost always be Linux-based, with CPU architectures being MIPS with the rare ARM.

has a limited busybox implementation which I can expand by using SamyGo binaries over USB

Noted in the comments as being very powerful for a non-smart TV. It has been postulated that the TV could even support mednafen, GNUBoy, or SDLMAME, alongside other possible potential applications. This TV would be an excellent EOP acquisition due to the sheer absurd nature of power in this non-smart TV.

https://old.reddit.com/r/linux/comments/1b188z/rooted_my_tv_what_can_i_do_with_such_a_limited/