Ron Grainer
From Tardis Wiki, the free Doctor Who reference
Ron Grainer (11th August 1922-21st February 1981) was an Australian composer who worked for the BBC in 1963, most notably he wrote the Doctor Who theme/score, which Delia Derbyshire went on to perform, he is credited in every Doctor Who episode in the original and new series expect for the 1996 television movie. He also wrote the theme music for other noted series, including The Prisoner and Steptoe and Son. His film credits include The Omega Man.