(Image taken from this blog)
Dave McKean is a comic artist whose never been afraid to break out of the traditional conventions of comics. Most comics fans know him from his covers for Neil Gaiman's Sandman series but he's also broken into the fine art world, children's book illustration, and film. I've loved his work since I was really little and have always admired the strange and often scary landscapes he's been able to conjure. He's definitely been a guiding light in revealing to me that comics don't have to just be about ink on paper.
I'm especially in love with this piece called "The Rut". The entire gallery is used to tell a single story and it might be an example of what "sculpture comics" can become. The panels of the traditional comic lead the reader from the wall to the ceiling to the floor and tell a narrative about a man in prison visiting a psychologist with supporting sculptures scattered across the room to further tell the story.
More info about the exhibit can be found here.