Kinoko Nasu and Keiko Takemiya. Nasu creates the female characters, Takemiya reminds him to treat them decently as she busies herself with writing in blatant yaoi subtext for the dudes.
Takako Shimura and CLAMP give each other lessons on finding the middle ground between touching but vaguely tedious slow-paced slice-of-life realism and absurd over-the-top balls-out romanticized melodrama full of self-indulgent and occasionally creepy fetishes. Heterosexuality does not exist in the world they create.
Cross-cultural genocide inducer: Yoshiyuki Tomino and George R. R. Martin. No life will survive. Except the guy played by Sean Bean, just for kicks.
Gen Urobuchi and Hiroyuki Imaishi. The outrageous flashy sexy campy characters and story actually turn out to conceal pure evil and despair. It would probably be called Nyarlatto-chan Boin Boin.
Kaishaku and Kouga Yun have a gay fanservice battle to the death over their new manga, and the resulting product destroys Western fandom entirely in a massive explosion of THAT IS SO DISGUSTING AND OFFENSIVE.
Shouji Kawamori supplements Moto Hagio's heartbreaking tale of gender-changing soulmates in space with mecha designs and advice on when the characters should burst into song.
Ryohgo Narita, Gen Urobuchi, and Kinoko Nasu play a tabletop RPG campaign together and then turn it into light novels. Wait, that one's actually happening. Carry on.
Yoko Kanno does the music for all of these. Every single one. This also actually happens, though. Half the time when I go to look up who was involved in a favorite anime's awesome music, it's her.
I didn't get a whole lot of sleep last night.