I bought a Sceptre because of another HN thread like this a couple of years ago and have been very happy with it. It's not as good looking as an 8K OLED, but it displays games and movies very satisfactorily, and best of all it's just a TV with no "smart" nonsense.
I also bought a sceptre 50” 4k dumb tv at the end of last year for around $225 and I have been very happy with it. It wasn’t HDR, but they are rolling out with HDR models now. Even so the color out of the box is pretty good and there are plenty of adjustments in the menu to tweak. Whats not to like?