Now I know what you might be thinking, how could I compare Alan Moore to an actual monster like John K? Now me hear out, Alan Moore is absolutely a better person than John K, who is a literal p*do. But looking at there overall careers and relation to their respective mediums (comics and animation), I find it fascinating how many similarities they have.
Both Moore and Kricfalusi grew up loving their respective mediums they would later work on (comics and animation), both would later go on to revolutionize the comics and animation industry (Moore wrote Watchmen and it made psychological, literary, sophisticated, and darker themes more prominent in comics, and K created Ren and Stimpy and it changed TV animation with grotesque and cinematic animation styles, leading animation in the 90s to be more creator driven and moving away from the 80s being mostly toy commercial cartoons). However, both would later have a falling out with the companies that owned these works (Moore left DC over creator rights and John K got fired by Nickelodeon). They would continue their careers and make more projects, but would also massively be critical of the comics/animation industry. Due to their criticisms of the comic/animation industry, both would get reputations of being snobbish, pretentious and out of touch. However both figures would still have a huge following of people who would defend their views (yeah John still has a lot of fans who defend his points about the animation industry surprisingly).
The big difference however is two things:
Unlike John K, Moore didn't piss his later career and reputation away.
Moore was still able to keep his talent and create good stuff, while John K's works plummeted in quality after Ren and Stimpy.