Actually, I've only seen bits and pieces of her show a
couple of times. I do know that I see references to her
famous book list, her famous personal problems, and her
famous love life all over the place. I do know that more
people relate to her than, say, Madonna. Though Hilary's
big-time embarrassment undoubtedly won her a lot of sympathy, I think her personality pretty well offset that.
So, Oprah still gets my vote. (Barbara Bush has the highest qualifications of anyone I can think of, but no longer has enough publicity to stay in the running.)

AnnaS., what say you? Who's our spiritual leader?