LG TVs and monitors said to surveil users and install bloatware without asking
(www.notebookcheck.net)
I had an old laptop that I hooked in and configured it to boot into a fullscreen browser to our Emby server. Could just as easily have it boot into a browser with shortcuts to your streaming services.
We use one of these mini keyboard/touchpads to control it:

Lately, though, I just picked up a set of wireless HDMI adapters and just plug one of those into the closest laptop and play from there.