By the way, we can also consider Necromancers as being the same! After all, they are all corpses! Skeletons, liches - these are human bones; ghosts are also bones, just flying. A vampire is a recently deceased person; a zombie is a long-deceased person, and he was very sick, which is why he is so bloated. In principle, banshees also have human skulls, so they are also dead people who fly like ghosts.
P.S. We won't touch on the Barbarians, just like we won't touch on the Griffins of the Humans.