I don't know who that is, but I googled him and among the first images that popped up were a brain with legs, a giant lobster, and a tiger smoking a pipe. I stand by my earlier point. A darker aesthetic doesn't preclude a lighter tone. B-movie horror can be (and usually is) both extremely gruesome and extremely silly. Same goes for something like Warhammer 40k, or the sword and sorcery stories that were D&D's primary inspiration.
D&D is a game about killing wacky monsters with twee names like "owlbear" and "gelatinous cube" to get treasure that makes you better at killing those same monsters, all of which traditionally takes place in the extremely artificial environment of a "dungeon." Even before the more modern superheroics creeped in, nothing about the premise or setting invites gravitas. Like, Vampire: The Masquerade is corny as well but at least it can play off the whole Anne Rice "I am a sexy monster!" melodrama. Even at its darkest, all D&D's got is adventurers dying gruesomely in a death trap of a dungeon—so basically Dragon's Lair.
Nothing wrong with cheese, by the way, but personally I find D&D type settings that take themselves too seriously to be suffering from an identity crisis. It's disconcerting to see, say, Pillars of Eternity be so dour when its setting isn't meaningfully different from the Forgotten Realms (yeah, yeah, I know about the metaphysics stuff, but everyone who runs D&D has their own slightly different but totally revolutionary twist on the Standard Fantasy Setting).