An American jazz pianist and composer, Mal Waldron (1925–2002) was a prolific figure known for his distinctive harmonic language and often dark, introspective style. He gained prominence as Billie Holiday's last accompanist and a house pianist for Prestige Records, contributing to numerous iconic hard bop and soul jazz recordings. Waldron's extensive discography as a leader and sideman solidified his reputation as a significant voice in post-bop jazz, particularly during his later career in Europe.