Tull Masterpieces:
Stand Up - 1969
Aqualung - 1971
Thick as a Brick - 1972
Passion Play - 1973
Too Old To Rockn'Roll - 1976
Bursting Out - 1978
Heavy Horses - 1978
Stormwatch - 1979
Broadsword and the Beast - 1982
There are a few almost masterpieces like Warchild or Songs from the Wood or Living in the Past. There are also very good albums like Minstrel in the Gallery, This Was, Crest of a Knave, Catfish Rising, Dot Com.
Jethro Tull 1968-2003...and beyond...