there are many artists that I look up to and gain inspiration from, but here are some of the most relevant and prominent ones right now:

Dan LuVisi, who is not only the most talented and Digital Painter I have ever seen, he also has a knack for creating deeply thought out, rich, and beautiful worlds and characters, as seen here: http://www.danluvisiart.com/

David Giraud: One of the most talented 3D Artists, especially in the area of 3D sculpting (zbrush) with a true gift for character design and style. Check out his amazing work here: http://mojette.deviantart.com/