What has he done that hasn't impressed you? He's basically just Solaris. So far he's only been 'beaten' in so far as Brainiac was able to create a shield that absorbed and redirected his own energies at him, but even that might not have worked had he been allowed to actually destroy Colu ('permission to destroy the continent', or whatever). He wiped out the entire Coluan fleet with ONE attack.
Owns.