Slash Artists

There's a great interview up today about Marcellus Hall, a musician/illustrator.  I love people who are more than just one kind of artist. (Joy Harjo?  Ethan Hawke?  James Marsters?  Check, check and check!)  As a general art nerd, I love the idea that someone could create within multiple genres and be just as respected for all of them. 
It's acutally pretty rare that happens though.  Edgar Allen Poe is the only artist I can think of who is equally respected for his poetry and his short stories, and in both cases, they are writing, so that might not count.  In the above examples I've listed, Harjo has a band but is better known as a poet, Hawke has published novels but is better known as an actor, Marsters has a band but is better known as an actor.  (In the interview, Hall lists several other examples.)  Many writers, once they have been writing in a particular genre, find it difficult to break out into another one.  I'm hoping this is a function of the capitalist system, that wants to peg people as one thing only.  I want to see more of these "slash" artists break out of their molds and do more and interesting things.