I really think people blow this crying about Orcs out of proportion, there was NEVER an actually interesting villain in this game whose reasons of being a villain boil down only to "I'm an Orc, Goblin, Drow or other evil race". And saying a whole species is inherently evil effectively diminishes all evil they do because you are saying they never could choose not to do it, which reduces them to children who don't know better. People should move on and stop flooding my yt feed with identical videos repeating the same points.
For demons and devils, that usually goes straight into supernatural, as they're not really a race, but physical manifestations of evil energies.
At tables I've played and run in the past, 'Outsiders' (fiends, fey, celestials, etc.) embody the epitome of an ideal or motive taken to its logical extreme, for better or worse.
Take Zariel for example.