20th-century British literary critic well-known for his atheism, as professed in his book Milton's God.
"Empson was much concerned with John Donne. As an atheist he could not conceive how an intelligent man like Donne could swallow a theologian's nonsense about God." - http://www.findarticles.com/p/articles/mi_qa3724/is_200109/ai_n8958772
"...the Christian critic C.S. Lewis observed archly that many objections to Milton's God seemed not to be against Milton but against God, a charge to which the atheist critic William Empson pleaded guilty with positive gusto." - http://www.jackmiles.com/default.asp?id=36&newsaction=newsdetail&articleid=35