My favorite is Bog king from Strange Magic - Has a song talking about how evil he is. But all he does is prevent the spread of dangerous mind control magic, and quarantine people under the effects of said magic. Yes he greatly annoys people doing so, but honestly? If I get hit by a love potion, please quarantine me.
Maybe I don’t know enough Doom lore but he seems not evil in the same way as Thanos. Sincerely believes that his way is the right way and the ego to try to force it on everyone else.
Or maybe Doom is not evil in the same way as saying Nazis made the trains run on time