2) Doomsday - ALL time greatest super villain.. been there done that.. has killed Superman
.. wat more do u need.. you defeat him once.. the next time he is gonna kick ur assss , cos he gets immune to it. 3) Ras Al Ghul - the classy arch nemesis of the Batman. HE aint a super villain.. he is normal guy who keeps gettin rejuvanted by a secret bath.. just the part that he is human and weilds such great power makes him awesome
4) Darkseid- The ruler of apocalpyse. posseses the omega beam which is supposed to stop or destroy anything in its way.
5) The joker - Sadism at its best. Read the arkham asylum series. You will not look at a clown in the same way again.
Will write a few more after i get some responses to this
.. there is a huge huge list. lets start one on superheroes too..