Sauron Greater than Morgoth...

[Eäralda Halatiriva]

Originally Posted by Inziladun

I don't recall a reference to Sauron being "the mightiest of the lesser Valar", though it is said in The Silmarillion that

Valaquenta

That just indicates Sauron was the most powerful of Melkor's minions. His relative status among all Maia would seem to be a question mark.

As for Eönwë. it was said if him that his "might in arms is surpassed by none in Adra". So in hand-to-hand combat, he might have an edge. Otherwise, though?
As the herald of Manwë, certainly Eönwë would have greater authority, but as for his "ranking" in raw power in comparison with the other Maia, I would say we can't know for sure.

thank you for clarifying that, Inziladun as well as reminding everyone that Melkor has many other servants "whose names have not entered into these Tales"