Melian among the maia

[Inziladun]

Originally Posted by Belegorn

Feanor himself, whether from Valinor or not was said the be the greatest of the Children of Iluvatar.

In The Silmarillion is stated that Fëanor was the most "subtle in mind" and "skilled in hand", though there are far more (and more important, I think) standards upon which "greatness" should be judged.