From the past, I would suggest Eugene Meatyard. I visited him at his home in Kentucky in 1960 and was treated to a collection of powerful and well-crafted 8x8 photographs. A talented man, Gene died too young.
My professor's favorite photographer, but then he used a Rollei and loved to do street portraits, and photograph family, and people in general. I have to admit that Meatyard was an influence even on this landscape photographer...