The only good panels now are also "smart" tvs with something like a roku or samsung spyware built in in an unavoidable way. You can't simply change inputs to avoid it because the whole OS you're changing inputs within is the smart TV's OS.
Buddy of mine used to work in a kabab shop before finishing his IT degree and helped out there off and on. He ordered an installed some 48" monitors (simple HD TVs) and then ordered a few for himself. I think they could 2 inputs max, but that's fine for most purposes.