With all the posts talking about this since it came up I figured that it was worth mentioning a book about a necromancer that flips most of that on its head. In Necromancer's end you have a pretty standard kid wanted to be a wizard & found someone to teach them backstory to a wizard... except they have a "split focus"(I think that was the term) and as a result they suck at being a wizard. Finally an exasperated wizard tells their pupil of "someone" who might be able to make something out of them & that it's probably a sign they should give up if not... "Someone" was a lich & that split focus is a good thing to have as a necromancer. Most of that was explored in memories thinking back & the book pretty much starts at the beginning steps of a dungeon crawl after the lich tells him to go off to adventure where he meets some actual adventurers & pretends he's a conjuration wizard.The story of the necromancer is generally one of depression and grief. Trying to bring someone back who's passed on, only to create abominations in their place
What better way to represent them than finally being able to achieve that goal of a true resurrection, built upon the many, many, many bodies they've had to sacrifice?
What really makes it interesting is that everyone in the world is absolutely certain that necromancy is so evil that any necromancer should be killed on sight (including people he just saved) yet he's pretty much the embodiment of somewhere between lawful neutral & lawful good in action while everyone around him is openly pretty deep into the various acceptable stereotypical murderhobo adventurer tropes.