Question: who is considered to be the greatest english composer of the baroque period?
Answer: Henry Purcell

Henry Purcell (/ˈpɜːrsəl/ or /pɜːrˈsɛl/; c. 10 September 1659 - 21 November 1695) was an English composer.  Although incorporating Italian and French stylistic elements into his compositions, Purcell's legacy was a uniquely English form of Baroque music. He is generally considered to be one of the greatest English composers; no other native-born English composer approached his fame until Edward Elgar, Ralph Vaughan Williams, William Walton and Benjamin Britten in the 20th century.