[Burrytar]

The most interesting "play with corpses"-style necromancers aren't shunted into a necromancy class; they are doctors/healers who go too far and funerary officials who don't go far enough.

Necromancers become stale when society expects them to do necromancy.

Regarding the broader spectrum of necromancers, anything that requires human sacrifice is made more interesting. Human sacrifice to contact the already dead, human sacrifice to make unkillable soldiers, human sacrifice to satisfy a hunger, etc., etc., etc.