Despite Steiglitz's eroticization of O'Keefe's art, he was a great photographer. The problem, as with many great artists, he had a great ego.
Minor White too, while he taught how to "be" and a new vocabulary for photographic artists, he was also a craftsperson, as was Weston, Adams, and Steiglitz. They knew their medium and used it to get the most they could from it.