The category-by-category list, updated for round 4:
(I corrected an earlier oversight by adding George Marshall to the list of military candidates)
Politicians and activists:
US Presidents and other political leaders:
Presidents (10/13):
John Adams: President, writer, statesman
Dwight D. Eisenhower: President, war hero
[del]Andrew Jackson: President, general, populist[/del]
Thomas Jefferson: President, Declaration writer
[del]John F. Kennedy: President, “New Frontier”[/del]
Abraham Lincoln: President, emancipator, writer
James Madison: President, Framer, statesman
[del]Richard Nixon: President, lawyer, author[/del]
James K Polk: President, statesman
Franklin D. Roosevelt: President, reformer, statesman
Theodore Roosevelt: President, conservationist, statesman
Harry Truman: President, statesman
George Washington: President, general, statesman
Other leaders (9):
Benjamin Franklin: Scientist, statesman, inventor
Alexander Hamilton: Financier, economist, statesman
Oliver Wendell Holmes, Jr.: Supreme Court Justice
George Marshall: General, diplomat, statesman
John Marshall: Fourth Chief Justice
William Seward: Diplomat; bought Alaska
Earl Warren: Chief Justice, governor
Daniel Webster: Orator, advocate, statesman
Roger Williams: Statesman, religious leader
Native American leaders (3):
Chief Joseph (Hin-mah-too-yah-lat-kekt): Leader, peacemaker, tactician
Sitting Bull: Indian leader, warrior
Tecumseh: Indian leader, uniter
Activists:
Women’s rights/suffrage (1/3):
Susan B. Anthony: Suffrage activist
[del]Carrie Chapman Catt: Women’s rights suffragist[/del]
[del]Margaret Sanger: Birth-control pioneer[/del]
Civil Rights/Abolitionists (8/10):
John Brown: Righteous, inspirational abolitionist
[del]Cesar Chavez: Civil rights activist[/del]
Frederick Douglass: Abolitionist, orator
William Lloyd Garrison: Abolitionist, writer
Langston Hughes: Harlem Renaissance poet
Martin Luther King Jr.: Preacher, orator, humanitarian
Jackie Robinson: Athlete, activist, inspiration
Eleanor Roosevelt: Reformer, writer, advocate
Harriet Tubman: Civil rights advocate
[del]Malcolm X: Civil rights leader[/del]
Other Activists (4/5):
Henry Bergh: Saved children, animals
[del]Daniel Bliss: Educator, AUB founder[/del]
Thomas Nast: Editorial cartoonist, muckraker
Thomas Paine: Political theorist, pamphleteer
Upton Sinclair: Author, muckraker
Scientists and inventors (10/15):
[del]Willis Carrier: Air conditioning pioneer[/del]
George Washington Carver: Agricultural botanist
Thomas Edison: Inventor, workaholic
Albert Einstein: Scientist, activist
John Franklin Enders: Modern vaccines pioneer
Philo Farnsworth: TV piorneer, inventor
[del]Richard Feynman: Physicist, Renaissance man[/del]
Benjamin Franklin: Scientist, statesman, inventor
[del]Kurt Gödel: Mathematician, incompleteness theorem[/del]
[del]Carl Sagan: Astronomer, science popularizer[/del]
Jonas Salk: Polio vaccine inventor
[del]Nikola Tesla: Inventor, engineer[/del]
John von Neumann: Mathematician, scientist, polymath
Eli Whitney: Inventor, cotton gin
Orville and Wilbur Wright: Aviation pioneers, inventors
Businessmen and industrialists (3/7):
[del]P.T. Barnum: World’s greatest showman[/del]
Andrew Carnegie: Industrialist, philanthropist
[del]Walt Disney: Animator, entrepreneur, icon[/del]
Thomas Edison: Inventor, workaholic
[del]Henry Ford: Inventor, industrialist, philanthropist[/del]
J.P. Morgan: Financial giant, tycoon
[del]John D. Rockefeller: Billionaire, philanthropist[/del]
Generals and soldiers (6/8):
Joshua Chamberlain: Civil War hero
Dwight D. Eisenhower: President, war hero
[del]Andrew Jackson: President, general, populist[/del]
[del]Douglas MacArthur: WWII general[/del]
George Marshall: General, diplomat, statesman
Audie Murphy: Decorated soldier, actor
George S. Patton: WWII general, orator
John J. Pershing: Top WWI general
Writers (11/17):
[del]Ambrose Bierce: Author, journalist, satirist, critic[/del]
[del]James Branch Cabell: Author, marriage proponent[/del]
[del]Bruce Catton: Civil War historian[/del]
Ralph Waldo Emerson: Philosopher, writer
Robert Frost: Greatest American poet
[del]Robert Heinlein: Science fiction author[/del]
Langston Hughes: Harlem Renaissance poet
Helen Keller: Redefined language, mind
[del]H.P. Lovecraft: Horror writer[/del]
Thomas Paine: Political theorist, pamphleteer
Edgar Allan Poe: Poet, writer, critic
Will Rogers: Humorist, social commentator
[del]Shel Silverstein: Author, humorist[/del]
Upton Sinclair: Author, muckraker
Henry David Thoreau: Poet, naturalist, philosopher
Mark Twain (Samuel Clemens): Humorist, “Huckleberry Finn”
Walt Whitman: Civil War poet
“Show biz” (1/7):
[del]Lucille Ball: Actress, comedian, redhead[/del]
[del]P.T. Barnum: World’s greatest showman[/del]
[del]Walt Disney: Animator, entrepreneur, icon[/del]
[del]Jim Henson: Beloved children’s programmer[/del]
[del]Marilyn Monroe: Legendary film star[/del]
Edward R Murrow: Broadcaster
[del]Orson Welles: Writer, director, actor[/del]
Musicians and composers (3/6):
Leonard Bernstein: Composer, conductor, educator
[del]John Coltrane: Musician, composer[/del]
Aaron Copland: Composer, musician
George Gershwin: Prolific, versatile composer
[del]Jimi Hendrix, musician and activist[/del]
[del]Elvis Presley, rock-and-roller[/del]
Comics (1/3):
[del]Walt Kelly: “Pogo” creator, humorist[/del]
[del]Jack Kirby: Comics pioneer[/del]
Thomas Nast: Editorial cartoonist, muckraker
Athletes (3/5):
Jesse Owens: Famed Olympic athlete
Jackie Robinson: Athlete, activist, inspiration
[del]Babe Ruth: Legendary baseball icon[/del]
Jim Thorpe: Native American athlete
[del]Babe Zaharias: Greatest female athlete[/del]
Miscellaneous (1/3):
Lewis and Clark (Meriwether and William, resp.): Louisiana Purchase explorers
[del]Charles Lindbergh: Aviator, American hero[/del]
[del]Frank Lloyd Wright: Prairie School architect[/del]