Superman's TRUE nemesis is Darkseid. They are a match for each other physically and Darkseid is like Superman's evil twin - who Superman fears he could become if he let his power be corrupted. Superman is also the ONLY being that Darkseid fears.
Enjoy this clip. Its okay to squeal with delight like a little girl. I know I do every time Superman really cuts loose. I also included another one of their great battles from the last episode of the animated 'Adventures of Superman.' Both are fantastic examples of great animation.