This is a great question. Lately I've been looking at old photos from the 80's and 90's, mostly the ones that photographed hiphop artist. I'm really being inspired by them these days. The list so far is Jenette Beckman, Danny Hastings and Chi Modu.
On a more modern note. I'm always excited to see what Joshua Kissi, Raven Varona, Dana Scruggs and the team at AB+DM will do next.