Dorothy Ann Blank

They let this gal work with the dudes from Disney.

Snow White and the Seven Dwarfs (1937) -- Co-directed with Walt Disney, William Cottrell, Richard Creedon, Merrill de Maris, David Hand, Wilfred Jackson, Larry Morey, Perce Pearce, Dick Richard, Ben Sharpsteen, and Webb Smith. To realize that this came out less than ten years after Steamboat Willie (itself a breakthrough) is pretty amazing: a full-blown feature length musical animated movie in color. You can trace back pretty much every animated movie back to this one, and not many have surpassed it.