Due to a slight delay in the delivery of new Crimson Fists stuff, I'll just stick to Chaos and here's an especially tasty one: Forgeworld's Great Unclean One. 

Very probably the most popular of the Greater Daemons they do and with good reason. This guy is barrels of fun to paint. He's still WIP at this point but expect to see more of him soon!

Of course I couldn't deprive you of his lovely backside. ;)