Cover Songs that are better than the Original

Eva Cassidy - Fields of Gold
Eva Cassidy - Over the Rainbow
Eva Cassidy - True Colors
Eva Cassidy - Time after Time
Eva Cassidy - Autumn Leaves
Johnny Cash - Hurt
The Who- Rush cover - The Seeker
Rush cover -The Pass  Fleesh Version

I went to see Golden Palominos in the late 80s at The Paradise in Boston, when Syd Straw was with them. The encore was The Ocean by Led Zeppelin, and with all due respect to Robert Plant, Syd was way better. Maybe the best cover I've ever heard.
Maybe not better, but very good.....

"Bridge Over Troubled Water" Johnny Cash
Judas Priest-Green Manalishi
Judas Priest-Better By You Better Than Me
Judas Priest-Diamonds And Rust
The Rockets-Oh Well
Santana-Black Magic Woman
Another Desperado cover, done by Clint Black.  

My favorite version of this great song.

Still about my favorite: Dave Edmunds' reworking of the Smiley Lewis song "I Hear You Knocking" (also done by Fats Domino and a few others).

For the inverse, compare The Beatles version of "Money (That's What I Want)" to the original by Barrett Strong. Barrett's version is much tougher, wickedly cool. Too bad Willie DeVille didn't do the song.