As you can see, Sufjan Stevens is way into Christmas. If the photo isn’t proof enough, perhaps his multiple Christmas albums will convince you.
Here are a few of his original compositions that I enjoy. He also does Sufjan-y versions of standards which I might link in other posts.
A Christmas film short set to the music of Sufjan Stevens. Created by John P. Gelety.
A live version complete with Sufjan-wings.