Alumni of Birkbeck, University of London in all BBC programmes
Ramsay Macdonald, Labour's first prime minister, chosen by Shaun Ley.
Playwright Kwame Kwei-Armah on Marcus Garvey, the inspirational 20th-century black leader.
Lawyer Yvonne Brown nominates the pan-African Nationalist leader Marcus Garvey.
Neurologist and author Oliver Sacks is Suzanne O'Sullivan's hero, she tells Matthew Parris