Tar Gibbons

The Tar is a character from the children's book series 'Aliens ate my Homework' by Bruce Coville, who insists on being called an 'it.' It is described by the main character as "my special teacher. It (you don’t call the Tar “he” or “she”-that’s offensive) has a lemon shaped body, four legs, and enormous eyes. … it had taught me amazing things. I loved the Tar very much. There is nothing better than having a true teacher."

http://wewalkamongyou.wordpress.com/2012/03/16/tar-gibbons-a-gender-neutral-character-in-a-childs-book/

Dino Valls

http://www.dinovalls.com/

Valls creates traditional style oil paintings that portray the psycho-surgical enigma of the human figure. Many of Valls' subjects have a 'natural balance' of male and female characteristics.. They are often given a physical sex, but their gender remains ambiguous. This is both challenging and inspiring. 

From an interview with Combustus magazine...

Deanna Elaine Piowaty: In Jungian psychology there is an acknowledgement that men and women possess aspects of each other’s gender ~ that men have an anima, or feminine awareness that comes out in dreams and creative efforts. What is your own connection with anima? How does it manifest itself in your life and in your work?

Dino Valls: One of the basic themes in my work is the duality in conflict, the struggle for the integration of the opposites, as a process of totalization of the human being.

Simultaneously, my painting is to me the mystic process that I follow to achieve my own integration.

http://www.combustus.com/13/dino-valls/