To supplement the topic on artists because I'd imagine there's a big difference between them (only one of my top 5 albums is by one of my top 5 artists!) largely due to classic albums by bands with small discographies (hello Neutral Milk Hotel!)

1) Joanna Newsom - Have One On Me (372)
2) Neutral Milk Hotel - In the Aeroplane Over the Sea (313)
3) Race Horses - Goodbye Falkenburg (269)
4) Blitzen Trapper - Furr (262)
5) The National - Alligator (261)

With normalisr.com

1) Have One On Me
2) Fucked Up - David Comes to Life
3) In the Aeroplane Over the Sea
4) The National - High Violet
5) Alligator