On the flip side of the coin, one photographer that I simply can't ignore is Vivian Maier. I've been looking at her stuff on the web, and was finally recently able to get a copy of the book that John Maloof put together. Her photos (if you like street photography) are nothing short of superb. I can say without ANY hesitation, that I have enjoyed her photos more than any and ALL other famous photographer's photos.
"Thanks, Henri, but I haven't got all day. Can I have my life back now?". Cracked me up
Vivian Maier actually studied other well known photographers [speaking of the above] and tried to apply what she had learned to her photography, obviously developing her own style in time. Her greatest talent was capturing an era with a non-intrusive yet intimate approach. Not all of her photos are works of art but many of them are unforgettable and in a collection, an extraordinary visual time machine.