Well, Imhotep surely craved the affection of Evelyn and Anck-su-namun, but it's hard to tell if that was actually his softer side or the kind of insane and obsessed selfishness we see with Count Strahd and Tatyana Federovna.
While I can't tell if there are any known fictional characters that inspired Mystic Carrion, that line surely hit home for my tabletop campaign. I have a rather powerful good-aligned (think crypt keeper knight) mummy NPC friendly with the player characters who once complained to a player that even years after being awakened, their bodies still have reflexes left over from being alive, like wanting to draw breath when startled although they too keep their lungs in a pot, developing cravings for food they can't eat, or expecting pain when cut or panic when they can't breathe, but then only feeling numb and dead. The warmth of a living being and feeling a heartbeat are calming to them.
In AD&D, other types of undead are usually tied to the Negative Energy Plane which comes with an innate hate for anything positive or living, although some higher undead can control this urge. Mummies, however, get their
regeneration and
rotting touch powers from their connection to the Positive Energy Plane which replaces their natural life force. If you're a real mummy nerd, the
ba remains with the mummy, while the
ka moves on to the Outer Planes and gets replaced.
