They made a grayscale version (well, three versions: grayscale, green-scale, and amber-scale) of that monitor called the NEC Multisync GS. I picked up a couple of the amber versions at a surplus sale in the early 90's. They were special, and I abused them in all sorts of unholy ways.
(In terms of "specs" they topped out at 640x480@60hz, but you could push them higher. At the sort-of-standard 800x600@56hz of the first "SuperVGA" monitors the flyback transformer would actually make an ominous growling noise and you'd have to spin the vertical size pot down near the minimum to fit the picture on the screen. The *very first night* I ever played with Linux on a creaky 486 hooked to one of these monsters I used xvidtune to make a custom mode line that ran X11 at 800x600@51 Hz, which lowered the dot clock down to about the same ballpark as 640x480@60hz and made the monitor "happy" again.)
I have to admit I sometimes wonder how many equivalents of a chest X-ray I gave myself mucking around with those things. They would indeed work with just about anything.