What size? What budget? What viewing distance? Not LG.
LG is the way to go if you are buying OLED, but there is nothing I would buy from them otherwise.
Sony and Samsung are the way I would go if getting a LCD display and had some money.
In a decent room, I would get OLED, and get LG any day of the week.
If you actually are talking about a computer monitor, then things may be quite different. Once again, size, and budget matter.