Lex Luthor
Everyone knows he is Superman's archnemesis- just like the Joker is Batman's.
An archnemesis is a particularly powerful or chief nemesis.
Because Lex Luthor was created before him and has the brain to outsmart Superman whereas General Zod is just an evil version of him.
The Joker's real name is Jack Napier in some versions.
Superman has lots of enemies. Lex Luthor is his archnemesis. Others he encounters are General Zod, Brainiac, Darkseid, Kalibak, Metallo, Parasite, Toyman, Prankster, and his doppleganger Bizarro. Doomsday is the intergalactic monster that successfully killed him. Everyone knows he does not stay dead and comes back to life thanks to the rays of the yellow sun.
utimate superman (strongest) superman prime one million superman prime superboy prime sowrd of superman cosmic armor superman all star superman sun dipped superman aplopit cyborg superman evil cyborg superman cyborg superman steel superman modern age blue superman eradicator superman red/blue ultraman bizzoro ad superman ga superman sa superman green latern superman pre crisis superman (weakest)
ultimate superman (strongest) superman prime one million superman prime super man with sowrd of superman tough robot superman all star superman cosmic super man silver superman pre crisis superman normal superman (weakest)
Superman Superman Returns Superman II Superman III Superman IV: The Quest for Peace Waiting for Superman Superman/Doomsday The Batman Superman Movie: World's Finest Superman/Batman: Public Enemies Superman/Batman: Apocalypse All-Star Superman Leaving Metropolis (which was called 'Poor Superman' in Canada)
superman
"Superman" (1948) "Atom Man vs Superman" (1950) "Superman and the Molemen" (1951) "Superman: The Movie" (1978) "Superman II" (1980) "Superman III" (1983) "Superman IV: The Quest For Peace" (1987) "Superman Returns" (2006) "Man of Steel" (2013)
Superman: The Movie Superman 2 Superman 3 Superman 4: The Quest for Peace Superman Returns There's also Superman: Doomsday which isn't part of the live action series. It's a stand alone animated version.
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