Superman vs The Elite shows why Superman is the best not for him being he first or being the 'strongest' but because he shows how all heroes should be with power. He shows someone can have a power of a god but use them to protect people he doesn't know. Batman doesn't kill because he is afraid he will become like his rogues superman doesn't kill to make a symbol of himself. 

Also I would like to see that. In the comics his telepathy rivaled Martian Manhunter sometimes