Donald "Buck Dharma" Roeser is an American musician, best known as the lead guitarist and vocalist for the rock band Blue Öyster Cult. Born on January 12, 1947, in Long Island, New York, he has been a key member of the band since its formation in 1967. Roeser is recognized for his distinctive guitar work and songwriting, contributing to many of the band's popular songs. Roeser gained fame for his hit single "Don't Fear the Reaper," which showcases his unique style and lyrical depth. Throughout his career, he has been influential in the hard rock and heavy metal genres, earning a dedicated fan base and critical acclaim for his contributions to music.