What are some of the most underrated women painters around the world?

So I've been commissioned to write an article about some of the most important and underrated women painters in the world so I'm looking for recommendations. However, before any fellow female painter forumites want to suggest themselves, the requirement for the article is specifically, women who began art movements around the world. Who influenced entire cultures and help to establish new artistic tendencies. Ideally, this would be women who come from places where it's difficult to pursue a painting career. Who had to struggle against all odds to be able to break through with their art.

Any feedback, info, would be appreciated.