Recently, I learned that 20th Century poet W.H. Auden was a serious convert to Christianity, and his writing was extensively about Christian things. He also had a good deal of overlap with Inklings J.R.R. Tolkien and Charles Williams. In his first decade of writing he was a non-believer, and was considered by many the foremost poet of his generation. After he converted, his work was largely ignored and disliked by his contemporaries.
I recommend check out his poems. I find them highly readable, interesting, and entertaining. Here are a couple of good links:
On the Circuit (http://www.poets.org/viewmedia.php/prmMID/15552)
The Shield of Achilles (http://www.poets.org/viewmedia.php/prmMID/15547).