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.
If you have ever seen Gabriel Dropout I love the character Satanichia. One of the best anime comedy characters I’ve seen and yeah she matches this description so well.