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.
I know, but why would that make morgoth a good guy? Also, I think the op was referring to the time fingolfin challenged morgoth, but he started in his fortress