Some Famous Unitarians 

Notable Unitarians include Béla Bartók the 20th century composer, Ralph Waldo Emerson and Theodore Parker in theology and ministry, Joseph Priestley and Linus Pauling in science, George Boole in mathematics, Susan B. Anthony in woman’s rights, John Locke in civil government, and Florence Nightingale in humanitarianism and social justice, Charles Dickens, John Bowring and Samuel Taylor Coleridge in literature, Frank Lloyd Wright in arts, Josiah Wedgwood in industry and Charles William Eliot in education.

Women have long been prominent in Unitarian and Universalist congregations. Olympia Brown (1835-1926) was the first woman minster (of any denomination) in America to receive ordination with full denominational authority which took place in 1863.

A comprehensive list  of important women is here  which includes links to short bio sketches for luminaries such as Louisa May Alcott, Emily Dickinson, Clara Barton, Margaret Fuller, Dorthea Dix, Jane Adams, Beatrix Potter, Fannie Farmer, Sylvia Plath, and Francis Moore Lappe. (This site is currently down- Jan 2017.)

Eleven Nobel prizes have been awarded to Unitarians: Robert Millikan and John Bardeen (twice) in Physics; Emily Green Balch, Albert Schweitzer, Linus Pauling, and Geoff Levermore for Peace; George Wald and David H. Hubel in Medicine;Linus Pauling in Chemistry, and Herbert Simon in Economics.

Five presidents of the United States were Unitarians: John Adams, Thomas Jefferson, John Quincy Adams, Millard Fillmore, and William Howard Taft.

Other Unitarians include Sir Tim Berners-Lee, inventor of the World Wide Web, Lancelot Ware, founder of Mensa, Sir Adrian Boult, the conductor, and C. Killick Millard, founder of the Euthanasia Society.

[Source: Wikipedia entry on Unitarianism]