Emulsion magazine will devote an entire issue to this question in the next couple of months. One (of very many) that fascinates is Margrethe Mather. She was every bit the equivalent of Weston, yet he spiraled up, and she down. Curious that.
Perhaps not so curious. I consider Imogen to also be the equivalent or better of EW yet a lifetime of work often equal or better than her counterpart went very nearly un-noticed. Maybe Margrethe saw the writing on the wall?