39. 'All My Love' (1979)
With a winding synthesizer solo by Jones, the majestic "All My Love" is one of only two Zeppelin songs not written or co-written by Page. It's Plant's mystical tribute to his son Karac, who died in 1977 at age five. According to a friend, Page "hated 'All My Love,' but because it was about Karac, he couldn't criticize it."