Scientists

Roger Bacon, monk, alchemy, father of chemistry. Also known by the scholastic accolade Doctor Mirabilis, was a medieval English philosopher and Franciscan friar who placed considerable emphasis on the study of nature through empiricism.
Isaac Newton was an English mathematician, physicist, astronomer, theologian, and author (described in his time as a "natural philosopher") who is widely recognised as one of the greatest mathematicians and most influential scientists of all time and as a key figure in the scientific revolution. 
Sir Isaac Newton PRS (25 December 1642 – 20 March 1726/27)