I came across Jesse van Dijk's work on an on-line forum and I really liked it. Two of his works, shown above, are used on two of the books of the German fantasy author, Alexander Lohmann (unfortunately I don't speak German so I won't be able to comment about Mr. Lohmann's books) and they are outstanding in my opinion.
If you visit Jesse van Dijk's site, you'll see various other book covers and some of his personal and commercial work. Especially where he plays with the light, he can create some amazing fantasy settings (clicking on the images will take you to Jesse van Dijk's site directly):
Update: In case you're wondering about the English translation of Alexander Lohmann's books, I contacted Bestei Lübbe, the German publishing company. They don't hold the translation rights and they kindly forwarded my enquiry to the author himself. I'll update this post when I hear more about this.