Alan Moore is a genius. I've read a lot of graphic novels. And I've read a lot of books. And even if I consider and critique all of what I've read at once, the conclusion remains the same, Alan Moore is a genius.
If you get a chance you should read everything he's written. It's not so much that Alan Moore plots and writes a good story. It's that he plots and writes a superlative story and then makes it all seem so easy. Neil Gaiman creates a magical place in the The Sandman. Warren Ellis fleshes out some plausible yet terrifying science fiction in Transmetropolitan. Grant Morrison moves us to tears in We3. And yet, Alan Moore finesses them all, in everything he writes.
Some of what he writes is difficult reading. His prose is profuse and calculated. Not a word is used unnecessarily. But he brings out the best in the artist illustrating the story. I've yet to see a badly drawn Alan Moore story.
So what's the tragic bit in all this? He's retired.