"The best way to incite diversity in Hollywood is to get behind the scenes." These are the words of Robert Redford, spoken at a seminar at the Sundance Film Festival and recalled by Carla Renata. "You have to produce the projects, write the projects... be one of the power players behind the scenes to inspire change. That's why having people like Oprah Winfrey is amazing."

Of course, the world already reveres Oprah for her decades of philanthropy and pioneering work in the media; but today, she continues to use her influence and resources to push for change. In 2014, she did so by executive producing Ava Duvernay's film "Selma" -- a project that brought to light the little-known story of 1965's Selma to Montgomery voting rights marches, and importantly, added some much-needed diversity to this season's all-white, all-male lineup of film award nominees. It is conscious investments like these that make Oprah a consistent paragon of change in Hollywood.

"Oprah Winfrey, hands down, is one of the most prolific, inspirational, powerful women of our time," Renata continues. "I don't think in my lifetime, we will see another woman accomplish what she has -- black, white or otherwise."