...that would be Chuck Barris. Gong was also the quintessential Eurohippie prog band, started by Daevid Allen after his stint in Soft Machine (has France given this guy a medal yet?). They've forked immensely over the decades; to list everybody in the family tree would take several nodes. Start near the beginning: the Radio Gnome Invisible Trilogy - The Flying Teapot, Angel's Egg, and You.