Okay so, Bilious Jack and autopraxis jack (spoiler in rot13: gurer'f gjb bs uvz) are both absolutely peak. I would also like to shout out Vast Error Jack (reframes carsapacians as NPCs and jack in specific in really neat ways, the Dead Shufflers intermission is one of the only things in fandom I've ever seen capture the energy of Intermission 1) and Sburb.exe Jack (less deep so far but he is impeccably well written and also stuck in prehistory and murdering dinosaurs. ludicrously funny)