Board Thread:General Discussion/@comment-4519633-20141022032431/@comment-27015049-20151223234958

I believe Nyx would be at the top of the list as she was easily able to defeat Jafar when he was all-powerful. After breaking the laws of magic, Jafar would have been even stronger than Rumple or any Dark One but the otherworldly Nyx remained superior.

Gods like Ursula and Poseidon may also be as strong or at the very least second to the Nyx. Though not proven, the Holy Grail may have been the creation of the gods.