I currently rate the LG UltraGear 45GR75DC as the best gaming monitor overall for most players. It's feature-rich and produces lovely images... you'll just need a large desk to house it.
But in case that isn't impressive enough for pros, you'll also be able to shrink the effective active panel size to either 27 or 24 inches, in addition to the monitor's native 32 inches. (Credit: ...