The ESP32 does everything a Pi Pico does, but costs less and lasts 100x longer on batteries ...
But if you want something a little more versatile, you may want to consider plugging a full-fledged computer into your TV.
The Radxa Taco is a carrier board for a Raspberry Pi Compute Module that gives you ethernet, USB, and HDMI ports plus a ...
I installed Android TV on a Raspberry Pi and learned exactly where DIY hardware meets its limits.