DeLillo was guilty of the college professor thing with White Noise, but otherwise he's kept his nose mostly clean. On Beauty by Zadie Smith comes to mind as a classic of the genre, but I'm picking at random - there are hundreds of forgettable novels about having an affair with your student and trying to get tenure while suffering from writer's block.
On the writing-about-the-process-of-writing front, I'd include Paul Auster, for New York Trilogy (perhaps the world's most boring book?), Mao II and even At Swim Two Birds, which was at least funny, ish. The problem is that writing, the activity, is very boring to describe, but also something that writers tend to spend a lot of time thinking about.
Joyce, you say?
Tolerable.