Nearly two years after her syndicated talk show went off the air, OprahWinfrey tops the Forbes list of the country's most influential celebrities.

The magazine compiled its list, released Thursday, with research by the Encino, Calif., firm E-Poll Market Research, which polled Americans to rank more than 7,500 celebrities on 46 personality attributes. Winfrey, 59 -- who since her show ended has concentrated on her cable channel Oprah Winfrey Network (OWN) -- was rated "influential" by 48 percent of those surveyed.

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Filmmakers comprise half the list, with Steven Spielberg, Martin Scorsese, Ron Howard and George Lucas at Nos. 2-5, respectively, and Clint Eastwood at No. 10.

Two women besides Winfrey made the rankings: broadcast journalist Barbara Walters at No. 7 and financial columnist Suze Orman at No. 9. Between them was the one foreign national, Irish musician and activist Bono. Winfrey protege Dr. Mehmet Oz, the TV medical adviser, was No. 6.