I am honestly surprised that I did not yet comment. Well, I sent that picture / link to friends that were interested in the Silmarillion and praised it how these two pictures of Eonwe here would look like ... just like he should look. The eagle's feathers are definitely a good addition. It just fits him very much.
Another amazing Eonwe! I love the sense of power and intensity about him. One can easily imagine him flying off to lay waste to Morgoth's minions. Your artworks will make me pay more attention to him when I next reread the Silmarillion!