Who is your favourite Photographer? And what is your favourite Photograph?

I can't say I have just one favorite photographer or one favorite photograph. I like the work of Sally Mann, especially the photographs of her children. There's one of her husband and her youngest daughter specifically that I love but I don't know what it's called. And I like Harry Callahan, the photos of his wife. Ralph Gibson and Edward Weston, their nudes. Mary Ellen Mark, her photos of the homeless. Imogen Cunningham, Jock Sturges, my favorite photographers all studied people, either their interactions and behaviors or the human form.