Question: Henry Wilfrid Brambell, was an Irish film and television actor best known for his role in the British television series "Steptoe and Son", and also performed alongside the Beatles in their film "A Hard Day's Night", playing which English singer-songwriter, multi-instrumentalist, and composer, that gained worldwide fame as the bass guitarist and singer for the rock band the Beatles, fictional grandfather?
Context: Steptoe and Son is a 1972 British comedy drama film and a spin-off from the popular British television comedy series of the same name about two father and son rag and bone men.  It starred Wilfrid Brambell and Harry H. Corbett as the eponymous characters, Albert and Harold Steptoe respectively.  It also features Carolyn Seymour.  A sequel "Steptoe and Son Ride Again" was released the following year. Richard Starkey, {'1': ", '2': ", '3': ", '4': "} (born 7 July 1940), known professionally as Ringo Starr, is an English drummer, singer, songwriter and actor who gained worldwide fame as the drummer for the Beatles.  He occasionally sang lead vocals, usually for one song on an album, including "With a Little Help from My Friends", "Yellow Submarine", "Good Night", and their cover of "Act Naturally".  He also wrote the Beatles' songs "Don't Pass Me By" and "Octopus's Garden", and is credited as a co-writer of others, including "What Goes On" and "Flying". Henry Wilfrid Brambell (22 March 1912 – 18 January 1985) was an Irish film and television actor best known for his role in the British television series "Steptoe and Son".  He also performed alongside the Beatles in their film "A Hard Day's Night", playing Paul McCartney's fictional grandfather. Steptoe and Son Ride Again is a 1973 comedy film.  It is a sequel to the film "Steptoe and Son" (1972) based on the television series.  Again the film starred Wilfrid Brambell and Harry H. Corbett. A Hard Day's Night is the third studio album by the English rock band the Beatles, released on 10 July 1964, with side one containing songs from the soundtrack to their film "A Hard Day's Night".  The American version of the album was released two weeks earlier, on 26 June 1964 by United Artists Records, with a different track listing.  In contrast to their first two albums, all 13 tracks on "A Hard Day's Night" were written by John Lennon and Paul McCartney showcasing the development of their songwriting talents.  The album includes the title track, with its distinct opening chord, and the previously released "Can't Buy Me Love", both transatlantic number-one singles for the band. Some Will, Some Won't is a 1970 British comedy film directed by Duncan Wood.  It was a remake of "Laughter in Paradise", and starred an ensemble British cast, which included Michael Hordern, Ronnie Corbett, Dennis Price, Leslie Phillips and Arthur Lowe.  It featured a cameo performance from "Steptoe and Son" actor Wilfrid Brambell who played Henry Russell, who has left four family members £150,000 in his will, on the condition they do the bizarre tasks he has set out for them. James Gerard Devlin (8 October 1907 – 17 October 1991) was a Northern Irish actor who made his stage debut in 1931, and had long association with the Ulster Group Theatre.  In a career spanning nearly sixty years, he played parts in TV productions such as "Z-Cars", "Dad's Army", "The New Avengers" and "Bread".  He also guest starred, alongside Leonard Rossiter, in an episode of "Steptoe and Son", "The Desperate Hours".  The writers of "Steptoe and Son" - Ray Galton and Alan Simpson - have since revealed that Devlin was second choice to play the part of Albert Steptoe in the series, behind Wilfrid Brambell.  He also appeared as Father Dooley, a Catholic priest, in several episodes of Carla Lane's "Bread", his last television appearance. Sir James Paul McCartney, {'1': ", '2': ", '3': ", '4': "} (born 18 June 1942) is an English singer-songwriter, multi-instrumentalist, and composer.  He gained worldwide fame as the bass guitarist and singer for the rock band the Beatles, widely considered the most popular and influential group in the history of pop music.  His songwriting partnership with John Lennon is the most celebrated of the post-war era.  After the group disbanded in 1970, he pursued a solo career and formed the band Wings with his first wife, Linda, and Denny Laine. "I Should Have Known Better" is a song by English rock band the Beatles composed by John Lennon (credited to Lennon–McCartney), and originally issued on "A Hard Day's Night", their soundtrack for the film of the same name released July 10, 1964.  "I Should Have Known Better" was issued as the B-side of the U.S. single "A Hard Day's Night" released July 13, 1964.  An orchestrated version of the song conducted by George Martin appears on the North American version of the album, "A Hard Day's Night Original Motion Picture Soundtrack." Paul Spencer Denman (born 29 July 1957), is an English songwriter and bass guitarist.  With Sade Adu, Andrew Hale, and Stuart Matthewman, he gained worldwide fame as the bass guitarist of the English band Sade.  He is also a member of the English band Sweetback.
Answer: Paul McCartney