English vocalist known for his distinctive vocal style and dynamic stage presence across multiple rock and R&B projects. Chapman gained prominence as the lead singer of progressive rock band Family, which he co-founded in 1966 alongside guitarist Charlie Whitney. The group became influential figures on the British rock circuit, with Chapman's powerful vibrato and energetic performances establishing him as a memorable frontman throughout the late 1960s and 1970s.
Following Family's initial run, Chapman co-founded Streetwalkers in 1974, further expanding his reputation within the rock and R&B spheres. His vocal approach, influenced by soul legends Little Richard and Ray Charles, brought an expressive intensity to his performances. Since the early 1980s, Chapman has maintained an active presence on the European music scene, with particular focus on his work in Germany and continued live performances across the continent.