4. Dee Rees
Probably the most under-the-radar director on this list, Dee Rees may have finally hit it big with her last film, Mudbound. The film is up for four Oscars at this years Academy Awards. Rees herself earned a nomination for best-adapted screenplay.
Although Rees is not well known, she is a veteran filmmaker, having an impressive filmography so far. Most notably, she earned two Emmy nominations for her HBO film Bessie based on the life of Bessie Smith starring Queen Latifah.