I know this has been covered elsewhere, but I'm looking to make a more definitive list.
Here are the ones I know; let me know if you can think of any more.
Travelling Riverside Blues
Living Loving Maid
Hey Hey What Can I Do
Gallows Pole
Tangerine
When The Levee Breaks
Stairway to Heaven
The Song Remains the Same
Over The Hills ands Far Away
Fool In The Rain (2 Parts!)