Most well written dark Superman story

Looking for some Superman stories uniquely grim, I know Superman himself often works better in optimistic tales, and that stories that attempted to try and make him more mature (though I hesitate to use the word as I understand maturity isn't synonymous darker and edgier) probably aren't the best of the best when it comes to Superman titles. Still I think a tonal flip could be interesting, similar to how I associate Batman with with dark and often grim storytelling, but still enjoyed the hell out of animated series Batman: The Brave and the Bold. So if anyone could suggest and direct me toward a less brightly colored Superman comic I would be appreciative.

I should note however I'm not necessarily looking for "Evil Superman" books