Board Thread:Lore Discussion/@comment-24.44.141.89-20131016215436/@comment-174.65.126.242-20150428030829

Jyggalag obviously was the most powerful, or else the other daeda wouldn't feel the need to band together to put a stop to his power. But after the events of Oblivion, he likely lost a lot of his power, but was freed from turning into Sheogorath. However, the reason the daedra cursed him was because of his realm's expansion, which means he was continuosly gaining power. Since he was freed, I think that he is slowly regaining his power and will eventually be as powerful as he was before the curse of Sheogorath.

If we do not count Jyggalag since he is probably regaining his power, than Sheogorath is pobably the most powerful. The reason for this is shown in the books telling of Sheogorath challenging other Princes, in which he wins all of them. But, this was before the Hero of Kvatch became Sheogorath and he may have lost a lot of power like Jyggalag did.

If this is the case, then the most powerful Prince would be narrowed down between Boethia, Hermaeus Mora, Mephala, and Azura (Mehrunes Dagon's aspect was defeated and his plan failed, Malacath is what became of Trinimac after being defeated by Boethia, Hircine's aspect was defeated in Bloodmoon, and the rest are considered to be weaker Princes). I would say that Hermaeus Mora or Boethia would take the cake.

On a side note, I would like to point out that Sheogorath possibly has a large influence in Cyrodil during Oblivion, because of his decree that no one shall have a beard besides him.

And no one does.