I thought it might be an idea to have a thread for portrait photographers who inspire us. As wide (or not) a definition of what a portrait is as you like
A place to dip in and out of from time to time.
I'll start it with one of my all time favourites - Jane Bown, a photojournalist who has taken more formally styled portraits as well as those in a documentary style. There's a good selection on this site if you go to photographs (sorry, can't link directly to individual pictures).
Also take a look at year 1954, "gypsy child" - maybe not a 'conventional' portrait, but to me a tremendously powerful portrayal of a small person, one that I've held in my memory for a long time.