The Wirecutter review of 27" 4K monitors likes a Dell U2720 monitor and the HP27Z. They also like a monitor in the LG 85 series but not the ones in the 67 and 55 series. (image retention).
I’m being somewhat vague in giving the model numbers because the ones that the Wirecutter reviewed don’t exactly match the ones you quote. I believe that almost every distributor gets a slightly different model with perhaps different trim and ports. However, I believe that models in the same numeric series for LG and initial letter and numbers for Dell share the same screen. However, you should carefully check the rest of the specs to make sure you get what you need.