Oh man, this a massively debatable subject.
COIE Anti-monitor is up there, Spectre, Lucifer and Michael, The Presence( of course), Overmonitor, Mandrakk, ZH Parallax, ION, White entity (Life)
That's just a few I could think of, no particular order.
You should of had some restrictions to this, unless you were just looking for the top most powerful.
If you ask me the top 10 most powerful DC characters in my opinion are:
- The Presence
- The Over-Monitor
- Elaine Belloc
- The Great Evil Beast
- Rama Kushna
- Michael Demiurgos & Lucifer Morningstar
- COIE Anti-Monitor
- The Spectre
- The Endless
- World's Funniest Mr Mxyzptlk & Bat-Mite