Robert Franks documentation work has inspired me for over a decade.

Humor & photography at it's best. Elliot Erwitt combines his 'serious' work at Magnum with wonderful - unexpected - perspectives. His website is a good start to explore. 

Helmut Newton – the master of image perfection, with only dark-room processing.

Annie Leibovitz body of work is nothing short of amazing.

Written in a very entertaining style, full of great information about using flashes for great results.

Impossible to describe, Gregory Colbert has creating an amazing visual style in still and motion images. Truly amazing.