Top 10 Powerful Comic Book Characters

No.10: The Hulk
No. 9: Thanos
No. 8: Thor
No. 7: Darkseid
No. 6: Jean Grey/Phoenix
No. 5: Doomsday
No. 4: Apocalypse
No. 3: Doctor Manhattan
No. 2: Superman
No. 1: Galactus

Well, I have some different opinions but this is a good reference.