Valjean, the musical artist, is well-known for his piano-centric renditions of various soundtrack themes, particularly from the 1960s and 70s. His distinctive style combines elements of classical and popular music, creating a unique sound that has brought him recognition. Valjean's most influential work is arguably his interpretation of "The Theme from Ben Casey," which became a Billboard chart hit. His contributions to the fusion of classical and popular music continue to hold a significant place in music history.