There are a lot of great albums, but I always think to Elton John's output from 1970-1975 as one of the best runs of any artist ever. From age 22 to 27, that man did in succession:
Elton John
Tumbleweed Connection
Madman Across the Water
Honky Chateau (my favorite)
Don't Shoot Me I'm Only the Piano Player
Goodbye Yellow Brick Road
Carribou (weakest of the bunch)
Captain Fantastic and the Brown Dirt Cowboy