[porphyrogene]

I'm using an LG 4k and while I have no idea what model yours is I had an interesting revelation that made the coexistence of my monitor with my MBP more palatable. I turned off the "Buzzer" setting (it's more of a beep) and now that I am not being confused by the beep I feel perfectly satisfied with the monitor and the laptop recognizing one another. Nothing changed except my perception but I think that beep was just noise (in the sense of irrelevant information) and I have since developed a sense for the time that it takes for my monitor to wake up and take the display off of sleep mode after I press a key.

All I wanted was to stick the laptop under my desk and run a keyboard, a mouse, two monitors, speakers and an external hard drive off of a single USB-C port and that one small change to silence the monitor's "wake-up beep" made a huge difference in the experience.