These are all fairly obvious choices (except the last one), and they're in no particular order.
- The Rolling Stones, Beggars Banquet
- David Bowie, The Rise and Fall of Ziggy Stardust and the Spiders from Mars
- The Beatles, Sgt. Pepper's Lonely Hearts Club Band
- Bob Dylan, Highway 61 Revisited
- Frank Sinatra, In the Wee Small Hours
- Miles Davis, Kind of Blue
- John Coltrane, A Love Supreme
- Gram Parsons, GP & Grievous Angel
- Johnny Cash, At Folsom Prison
- Jean Ritchie, Ballads from Her Appalacian Family Tradition
(Okay, it's cheating to list both by Gram, but I can't pick. They're both fabulous.)
