What DC top tier characters has Superman NOT fought?

Trying to compile a list.
Not abstracts per say, but physical beings.
Has he gone one on one with Metron, as an example.

Has Metron every actually FOUGHT with anyone?

He must have fought Superman. Looks like everyone has going by the (lack of) responses.

The Grapplah ?

Originally posted by Flyattractor
[b]Has Metron every actually FOUGHT with anyone? [/B]

I've yet to read a New God issue were Metron physically engaged in fisticuffs. Even in the story with the Anti-Life were Meteon played big part, he still didn't engage in combat.

I guess he IS smart!

First Born?