the thing about google is if you don't know what you're looking for you won't find it.
But I read a superman comic once - a fanart submission where clark kent had superpowers in high school, and thus was able to see cancer cells manifesting and then overwhelming a friend of his. Yet despite his super powers, he was not able to do anything to save or to help. On his deathbed, the friend (who does not know of Kent's powers) teaches superman a valuable lesson which sticks with him throughout his life.
This in contrast with the typical superman plot -
http://i53.:bou::bou::bou::bou::bou::bou::bou::bou::bou::bou::bou::bou:/foeqkp.jpg
All the power in the universe and he can't even get one girl. And he keeps moping about it. Yeah that's a good role model for you.
Then as Foaffles said there's Batman and his demons, which could have been cool (Joker telling Batman he's like one of the rogue's gallery, despite all of his denial), but this isn't explored enough.
What is the topic about anyway?