I bought a 65" 4k@60hz HiSense TV (65H8C) about a year and a half ago, haven't had any major complaints. It's always in PC/game mode which turns off as much of the post processing stuff as possible and it's low latency enough that I can play games on it without irritation. It's technically "smart" but it's never been connected to a network, I just use it for HDMI out of a media/gaming PC + consoles.

If you don't need something that big or bigger, there are lots of options in the 40-50 inch range... 3 years ago I got a dumb 42" 4k@60hz Seiki "TV" solely to use as my primary workstation monitor, it works fine for movies too. I did have to get some beta firmware from Seiki's Facebook account though in order to remove the unbearable latency even for programming tasks (gaming was out of the question before the flash).

Neither of those is going to impress someone who really cares about display quality of course. They work for me.