Darkseid, his omega beams can kill superman if he's hit multiple times
;l
I think in Grant Morrison's run at the JLA comics (which starts with "Book 1: New World Order), Superman calls Batman the "most dangerous man on earth."
Lex Luthers enemy is Superman. He's out to destroy him
Lex Luthor has been a recurrent Bad Guy in Superman since his superboy days. He owes his baldness to a botched chemical-warfare experiment and he blames superman for this condition.
it would have to be a desert tiger or leaperd. mabey a snake!
Lex Luthor, Doomsday-maybe others can add more
Lex Luthor
Who
The Six Million Dollar Man - 1974 The Most Dangerous Enemy 4-4 was released on: USA: 17 October 1976 West Germany: 20 February 1989
A snow leopard is an enemy of the Giant Panda. Humans are also an enemy of the Giant Panda. Humans are also the most dangerous enemy..
Most definitely Superman
No. Bizzaro can be a nuisance & antagonist but he can't be described as an "arch-enemy", certainly not in the same manner as Lex Luthor or Darkseid.