These are either comilations where it's the only album I have by that artist or a true thematic compilation. There's also some random albums I couldn't quite stick anywhere else.
Compilations by one act
The Original Musiquarium I, Stevie Wonder
History, America
Chicago IX
The Best of the Doors
Interestingly, I have two of the last one, and they aren't the same. The more comprehensive one has a computer-made insert.
Compilations by the many
Mellow Sixties, including songs like "Brown Eyed Girl," "Turn, Turn, Turn," and "California Dreamin'"
British Sixties, including songs like "Catch the Wind," "Do Wah Diddy Diddy," and "You Really Got Me"
Common Threads, Eagles songs done by country artists
Comedy
Monty Python... Sings, Monty Python's Flying Circus
Class Clown, Occupation: Foole, Indecent Exposure, George Carlin
The last Carlin album is also a compilation.
Allez Randomness!
Tones, Ah Via Musicom, Eric Johnson
Hand on the TorchUs3
Keep On Movin', Soul II Soul
The Segovia Collection (Vol. 3), Andres Segovia