Nope. Too late. I'm not an ENFJ anymore. If Oprah is "me" then screw it. Hitler, I get. Her? Not at all.
Well, the INFPs are stuck with me. I think every type has their bad apples.
Oprah may or may not be ENFJ. Keep in mind that there are alot of people working behind the scenes to craft the "Oprah" image. From a high level view, it's very tempting to classify her as an Fe dom. She is very personal, and tries to reach out and and touch the emotions of her viewers. She is an intriguing mixture of personal generosity combined with a (I find somewhat raw) desire for money, power, and influence.
However, I do suspect that alot of people type her without having really watched her show. ENFJ is tempting because of the scope and vision of her empire, but for all we know she's an ESFJ that has some visionaries working for her. I wouldn't bet one over the other, personally.
From the times I remember watching the show, I can see ESTJ to some extent. Value in acts of service. Preaching of traditional values. Ne relief function could explain some of her creativity. Honestly, if you are up for making your case I'd be pretty interested in hearing it. Edit: Oh yeah, ESFJ has Ne relief as well.
Also, I don't think there's a single person here who, despite thinking Oprah is ENFJ, considers you in the same boat as her.