http://www.vivianmaier.com/
Apparently, no one knew that this woman was an amazing photojournalist until her photographs were sold at an antiques auction a few years ago. At that point, she was on her deathbed, so the man who found/fell in love with her medium format photographs (most of which she took using B&W film in a rollei camera) was never able to tell her how amazing he thought her photos. Her works are currently showcased on a blog, website, and a soon to be published book. Craziness.
This is one of my favorites:
