The OP did initially ask about photographers and while there are numerous examples of portrait and fashion photgoraphers using large formats, thought I would highlight one of my favourites, Evelyn Hofer who died four years ago and really should get more attention. Nearly all her work was shot on 5x4 and were mostly portraits. Black and white in the main, but also some colour which was printed as dye transters for exhibition. I believe she was printing her own 20x24 b&w prints. Steidl published an excellent monograph of her collected work though there were several city travel books published from the early 60s onwards which were mostly portraits. (London, Dublin, New York, Washington plus) These can be bought quite reasonably on abebooks.com.
Here are some links;