Bach - Double Violin Concerto Vivace, Concerto No. 5
Beethoven - 5th
Holst - Mars Bringer of War
John Williams - Jurassic Park Theme
Metallica - One, Call of Ktulu, Orion, Fade to Black
Zao - Ravage Ritual, To Think of You is to Treasure an Absent Memory, Man in Cage Jack Wilson, Violet
Extol - Storms of Disilussions
Guns n Roses - November Rain
Queen - Bohemian Rhapsody
Toruniquet - Erratic Palpitations of the Human Spirit
Charlie Daniels Band - Dueling Banjos
Joe Satriani - A Piece of Liquid
Yngwie Malmsteen - Instrumental Institution
Aaron Neville - Crazy Love
Van Morrison - Moondance
Simon and Garfunkel - Bridge Over Troubled Water
Beatles - Yesterday
I have more, but it will take a while to come up with them all. Note that I am basing these songs/pieces on beauty and/or difficulty in playing them correctly. For example, Metallica's songs are hard to describe as "beautiful," but they are very talented musicians and not many people can play as fast or as uniqely as they can.