Love these illustrations by Claire Hummel (shoomlah on Deviant Art). Claire redrew Disney princesses to have more historically accurate attire. To see some of the resources she used for the dress designs, read her resource page. You can also read an FAQ about this series.
Erik Schumacher (kire1987 on Deviant Art) is a German student studying physics, but in my opinion, he should stick to art. He definitely has some impressive work and is part of the distinguished Depthcore art collective. There is a distinct style to his work, but his techniques don't feel overused. Check out some more of his work on Deviant Art.
If you ever get discouraged with your work and need some motivation, recall the paintings of Huang Guofu. Huang lost his arms in electrical accident at the age of four, but never became discouraged. Instead, he pursued his dreams by painting with his feet. At the age of 18, Huang's father became ill, so he traveled China and sold his painting to help pay for his father's treatments.
He became so good at painting that he was awarded the role of vice-curator at the Chongqing Talents Museum and has encouraged other mouth and foot painters to join the museum.
Albulena Panduri (blue-a on Deviant Art) has created some absolutely stunning photo manipulations. Each one grabs you and draws you into a surreal and beautiful new world. I couldn't help but stare in awe at all of her fantasy worlds. I highly suggest checking out the rest of her gallery if you get a chance.