Can't go wrong looking to Shulman and Stoller. Working today? is still active, I believe. He has a couple of how-to books that provide a good foundation for those who have the basics of photography mastered and want specialized knowledge about architectural photography.

The New York Times lens blog featured him in 2011 here:

And along the Ezra Stoller line, I'm no expert, but would guess any of the folks associated with his Esto would be industry leaders today: