If you know of Alphonse Mucha, you probably know his art nouveau posters with the outlined ladies and plants and stuff.
Do you also know the Slav Epic?
Read about it here:
http://en.wikipedia.org/wiki/The_Slav_Epic
It's just masterful stuff. I love the fading dark values, the colour palettes, they both remind me a bit of Frazetta. And it's epic and posed and massive. :)