My old girlfriend (who, in an unrelated story, sang on stage with Frank in 1978) graduated from Canarsie ("where everyone looks the same") high school with Warren Cuccurullo. I had the opportunity to meet Zappa at his house. If Joe's Garage is your favorite, I'm sure you are already aware of his relation to the band and the album.
Pixies - Surfer Rosa
Police - Synchronicity
U2 - Unforgettable Fire
Miles Davis - Kind of Blue
Yo La Tengo - I Can Hear the Heart Beating as One
Bob Dylan - Blonde on Blonde
Sun Kil Moon - Ghost of the Great Highway
This list could fill the forum. There isn't *a* favorite.