As a songwriter, Harrison was continually out-gunned by Lennon-McCartney. The intense trio of songs he contributed to Revolver — “Taxman,” “I Want to Tell You,” and “Love You To” — would be his most significant contribution to a single Beatles album. He had other classics to his credit, including “Here Comes the Sun” and “Something,” his first Beatles A-side, a track which would top the charts in America. (Both came off 1969’s Abbey Road) But Harrison also funneled his creativity into the guitar, a suitably introspective pursuit. From his raw, early rock-and-roll influences he extrapolated a wide-ranging and poetic style. In the late sixties, he helped introduce the slide guitar to prominence; he also popularized the 12-string Rickenbacker guitar and its ultra-distinctive sound on 1964’s A Hard Day’s Night.