Dell - S2722QC 27.0" 4K IPS LED UHD - AMD FreeSync - VESA - Monitor (USB-C, HDMI)
Looks great, not super high refresh rate but for many that isn’t an issue, if you want high refresh rate, 4k AND OLED - it’s going to be $$$, but if that’s not an issue look at the LGs. I love the Dell 4K - my MBA M2 looks amazing… you can actually read text lol and not blurry at all. I used the USB so it charges my laptop and powers it up. 
oops- maybe I shouldn’t reply via iPad lol. The one on the right (with the monitor light, is one of the 4Ks I mentioned. Best Buy will price match and I found a flash deal for $180 and they honored it, even so, it’s on sale and a good price in my opinion…