This piece of art is superb. Totally agree with everything you say about it. I played in this campaign, run by @TheSword , and it was brutal!
My half-ogre cavalier, Gunther Von Panzerkrieg, was pretty brutal too...
Artist: Dave A. Trampier (1979?)
Source: Dungeon Master's Guide
Place: In front of the Green Griffon
This might be cheating a bit, since the "Green Griffon" AFAIK isn't detailed somewhere and this is actually heavily inspired by real-world Rhodes, but I've always loved this piece which is very evocative.
From C1 Hidden Shrine of Tomachan
Artist - I believe that's a Trampier
This is the module that made me fall in love with Greyhawk. I was all of 12, 13 years old when we played this. The history just drew me in. Lost spaceship the II Redraw just stuck with me forever. It's a well I've gone back to time and time again.
It's probably cheating, but whatever place the chess scenes from.the covers of Dragon 83, 86, and 89 by Denis Beauvais are taking place in, is pretty cool... (And remind me of the old C64 game Archon too).