Greg Lake was the singer and bassist for prog rock band King Crimson before becoming a full time member of prog rock band, Emerson, Lake & Palmer. I never listened to King Crimson all that much but I listened to ELP a lot. I love the ELP album, “Brian Salad Surgery”. There is only one surviving member of ELP left and that is the drummer, Carl Palmer. Greg Lake is up there with Keith Emerson now.