Question

an American reformer who campaigns against slavery

Answer 1

evangelicals and quakers

Answer 2

William Lloyd Garrison

He was a prominent American abolitionist, social reformer and journalist. He was the editor of "The Liberator" which was a radical abolitionist newspaper. He was one of the founders of the American Anti-Slavery Society. 

Benjamin Lundy was an American Quaker abolitionist who worked with Garrison.