 He is generally acknowledged as being the first keyboard player in rock music to stand and take a leading role, thereby providing a model for others such as Keith Emerson and Rick Wakeman.He is also credited as being responsible for rewriting standard songs and arranging music in a style that later became fashionable as progressive rock.During a Saville Theatre concert in 1967, he introduced a then-unknown David Bowie to Jimi Hendrix.