User blog comment:Calvincambridge30/Versus/@comment-95.112.164.109-20151031224135/@comment-213.152.161.69-20151101034347

Lucifer could kill Sauron he could apport his ring to Mt Doom, Sauron has no reality warping abilities.

Sidious

Possibly Eru, but Melkor will wound him at the end of time, so he is certainly only nigh-omnipotent.

The Dark Side of The Force is omnipresent and it's power nearly unlimited, The Darkness was not that impressive yet.

Can't decide in that case

Possibly Luke

Michael + Dick, though Sidious in EU  can't be destroyed and every single jedi is needed to bind his power and hold him imprisoned in Chaos.