By now, I'm sure you know Jim has passed. One of the greats of early TSR's pantheon of phenomenal artists, Jim didn't just illustrate the game, he helped give it its own, unique, iconic look. His work is instantly recognizable.
He was also a nice guy, humble and friendly. I found him a few years back running a stained glass business with his wife, to see if he'd like to do some work for Goodman Games' Dungeon Crawl Classics. He was, and he stepped up to the challenge remarkably, cranking out new images of adventure like he had never stopped.