Goodall has compiled a list of the "ten most important pieces" of all time (in chronological order):

1: Hildegard von Bingen: Ave, Generosa
2: John Dowland: Flow my tears (pub. 1600)
3: JS Bach: St Matthew Passion (1727)
4: Mozart Serenade 'Gran Partita', iii Adagio (1781)
5: Beethoven: Symphony No. 3 Eroica, funeral march (1805)
6: Schumann: Kreisleriana (1838)
7: Verdi: La Traviata, Addio del passato (1853)
8: Liszt: Hungarian Rhapsody No. 2 (1847)
9: Stravinsky: Les Noces (1923) excerpt
10: Steve Reich: Music for 18 Musicians (1974-6)

Two and a half of those are in my desert island discs and two I wouldn't visit on my worst enemy...