Alright, I guess I can keep going.
Something a bit closer to Neverending Nightmares 1's art syle would be the completely and quite literally insane scrawlings of Spanish artist Francisco Goya, probably most famous for Saturn Devouring His Son, which lovingly adorns the cover of The Philosophy of Horror by Noël Carroll. When he was in his 20s, he fell extremely ill to an unknown illness which slowly deafened him and drove him insane. There are theories ranging from poisoning from the lead paint he used to viral encephalitis, but ultimately he never talked about it with anyone so we'll never know. He started getting more and more strange and withdrawn, until he locked himself inside his house and painted a bunch of extremely dark and disturbing pictures all over his walls, one of which was Saturn Devouring His Son. I would probably have a heart attack if I was walking through an insane artist's hovel, stepped into his bedroom, and was greeted by this fucking thing on the wall:
And keep in mind that it being about Cronos eating the gods is just what we
think it's about. He never offered a title, context, or explanation for any of those paintings.
Anyways, even though his creepiest stuff is arguably in his paintings, he still managed to do some etching and lithography as well:
And yes, that was a naked man with his arms cut off impaled on a tree branch. All this and more and be found here:
http://www.wikiart.org/en/francisco-goya#close