Oprah Winfrey (character)

Oprah Winfrey is an American television host, actress, producer, and philanthropist, best known for her self-titled, multi-award winning talk show, which has become the highest-rated program of its kind in history.

History
When Homer was in a mental hospital their phone had Oprah on the speed dial.

Non-canon
On the TV-show , which was broadcast on the November 4, 1992 on ABC, she interviewed the creator of The Simpsons, Matt Groening and then went to interview the Simpson family themselves.