Jeff Wall

Jeff Wall's photography pulls from art history as inspiration for his projects. Though he has used traditional photography as a medium, some of his work is an excellent example of how powerful digitally altered photography can have.

Jeff Wall is also an art theorist. I found an interview where he was asked about expressions in art versus art theory:

"I think that there's an intellectual element, an intellectual content to art, or an intellectual content to the way we relate to art. There's also what we call aesthetics, which is a philosophical attempt to understand the experience of art; that's something I've always been somewhat interested in, if not necessarily in an academic way, but just in a reader's way."
~Jeff Wall