It isn't techniclaly a Creepypasta, but I thought this might be of itnerest to you. It combines dark comedy and genuinely distrurping moments together quite well. I've loved this guy's work for ages, and he's done a lot of great flash animation as well. My favorites are Televangelista, The Grim Reaper Show 5, and Anthropomorphic. So yeah, check it out.

Haven't seen any of his other work, but I liked that story. Black deadpan humour and some disturbing imagery, mmm.

Well, if you'll take a look at his animation on his website, you'll see a lot of the same darkly funny tone snd disturbing imagery IN ANIMATED FORM! Sadly, there used to be an extended script for "Anthropomorphic" up on there, but it's gone now. Shame too, as it actually had some quite neat tidbits.