Pink Floyd

Two psychedelic milestones ("The Piper at the Gates Of Dawn" and "A Saucerful Of Secrets"), a crazy yet monumental live album ("Ummagumma"), the greatest example of symphonic rock ("Atom Heart Mother"), and the beautiful progressive parentheses ("Meddle," "The Dark Side Of The Moon," "Wish You Were Here," "Animals") culminate in two excellent singer-songwriter style records ("The Wall" and "The Final Cut"), establishing Pink Floyd among the greatest rock bands of all time. The rest is a tip.