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.
Well, he never says he’s evil but is certainly seen as a villian: Dr. Victor van Doom. He’s actually seen all possible timelines of humanity and only the one where he reigns is not ending in destruction. https://qph.cf2.quoracdn.net/main-qimg-4d9668819558c73a8fda43cd4bc0ef0a-lq He is also loved by the people of the country he does rule. And when he had indeed managed to rule the world, it was a time of peace. I mean, mind control peace (he amplified the power of Killgrave the Purple Man) but still.