The Treaty of Tripoli - The treaty was a routine diplomatic agreement but has attracted later attention because the English version included a clause about religion in America. (As the Government of the United States of America is not, in any sense, founded on the Christian religion.)
John Quincy Adams - 6th President of U.S. - son of John Adams, (2nd President). He served as Secretary of State under James Monroe, and is regarded as one of the greatest diplomats in American history. He reportedly had the highest IQ of any American President. He died in 1848 at the age of 81.
The Addams Family (movie version, though the TV series came first). Other films that would make good Hallowe'en costumes because they're famous, though not really "fashion": The Munsters (similarly, a TV show first), scI-fi (Barbarella, Star Trek, Star Wars, The Rocky Horror Picture Show), fantasy (Mary Poppins, any Disney animation), Rocky, Shaft, Tom Cruise in "Risky Business", Men in Black.