Solar Man of the Atom!
the Spectre
Jenny Sparks
JSA
The Authority
Superman Batman & Wonder Woman
Maybe Neron and Eclipso alongside The Spectre and Kismet and um I am running out of names. Well as long as it won't go to Superboy Prime facing him and whining "Don't you get it? I am supposed to be Superman!" and reality punching him to wherever or whatever.