King Crimson’s 1969 debut album is often considered the group’s best. It is the album that transformed psychedelia into progressive rock influenced by jazz and classical music. Prior adventurers such as The Moody Blues sound tame in comparison to the wild-eyed ambitions of “21st Century Schizoid Man.” The members all dominate their instruments, with Ian McDonald bringing the Mellotron to center stage along with his expansive saxophone work, while Robert Fripp takes the guitar beyond the blues and singer Greg Lake commands the mic.