Genies.
But they should be inspired by the Jinn of the middle east so that they can have an advancement tree similar to vampires and they can have different specialities and levels of power and whatnot.
Or maybe a ghost overhaul that introduces angels and demons. Ghost could be the neutral state, and they could become more of an angelic or a demonic type of occult depending on how good or mean they were in life, or even based on what they do as ghosts. Very secular forms of angels and demons, of course. Higher beings and lower beings, whatever you wanna call them lol i just want being dead to mean more. It would also make the reputation system even more impactful and meaningful.
