She actually did win an Oscar - for producing the live action short, The Accountant featuring two other actors that are also "not very famous, but should be" - Ray McKinnon and Walton Goggins. In fact, those three wonderful actors appeared in a couple of films written and directed by McKinnon. One of those films was Chrystal, with Billy Bob Thornton, in which she gave another overlooked Oscar worthy performance.
When she died in 2010 of a rare blood disease, Hollywood ignored her again by not paying tribute to her in the In Memoriam section of the Oscar telecast. Well, for what it's worth, I noticed her career. And if you aren't familiar with her work, you should take notice as well.
Lisa Blount's name might not be a familiar one, but check out her work. It will stay with you.