Greatest album run by a band?

My vote goes to the incredible six-album run by the Who from 1966-1973:

1966: A Quick One

1967: The Who Sell Out

1969: Tommy

1970: Live at Leeds

1971: Who's Next

1973: Quadrophenia

Quite a stunning array of music....you start with two classics of mid-60's power-pop, move onto the most notable rock opera of all, throw in one of the greatest live albums ever recorded, shift into the album many consider the greatest rock album ever and close with the greatest (in my opinion) rock opera of all.

Of course, the Who have put out mostly dogshit in the 35 years since Quadrophenia, but that still doesn't detract from the greatness of this run.

I'll take your nominees in the comments