Condi Rice?
Oh man, what a dig for poor Mary Anne although I'm sure you didn't mean it that way. There's a recurring character on CSI, the dominatrix woman that William Peterson's character has become extremely close to that has this deep intelligence and suave sexuality that I just know (wish) closely resembles Mary Anne when she drops the librarian persona.
Others
SDAI - the kid villain on "The Incredibles"
Robert - Jean Luc Picard (without the accent)
Jody - Mary Anne on Gilligan's Island.
Lindy - too unique.
Tom - I have statistics and links to prove he's really Karl Rove in disguise.
ER - Thomas Jefferson on Ecstasy.
Art