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?
Sentence (from "Paul McCartney"): After the group disbanded in 1970, he pursued a solo career and formed the band Wings with his first wife, Linda, and Denny Laine.
Relevant evidence: No