Anthem by Leonard Cohen is in Gb at 64 beats per minute and runs 6:23 across 37 bars. It uses 31 chords — Bbm, Am, Absus4, Gsus4, Ab, G, Db, C, and a few more. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? Anthem guitar melody tab.