The Upsetters

Do not confuse with the early 1960s ska band; artist 1221416, or Little Richard's The Upsetters (2).
Lee Perry's studio band for the Upsetter label - the same as in Lee Perry & The Upsetters. Formed in 1968 the Upsetters had three distinct line-ups. The first line-up was comprised of Gladdy Anderson & Winston Wright (keyboards), Jackie Jackson (bass), Hugh Malcom & Lloyd "Tin Legs" Adams (drums). This line-up was also known as Gladdy's All-Stars. They recorded "Man from MI5", "Return of Django" & "Live Injection" with Perry.
In 1969, Perry was approached to go on tour in Europe, but Gladdy's All-Stars were not able to make the trip. Perry turned to another young band called The Hippy Boys who were working with Edward "Bunny" Lee. The Hippy Boys consisted of Glen Adams (keyboards), Alva "Reggie" Lewis (guitar) Aston "Family Man" Barrett (bass) and Carlton Barrett (drums).
After the European tour Perry and the Upsetters worked closely with The Wailers up until their falling out in 1971. The Barrett brothers went on with Bob Marley at this juncture.
By 1972, The Upsetters were a true "floating" band. Perry decided to forego a permanent line-up and simply used the best musicians he could find at the time.
During the Black Ark era (1974-1979), the core of the band was Boris Gardiner (bass), Mikey Richards and Benbow Creary (drums), Earl "Chinna" Smith and Robert Johnson (guitar), and Winston Wright and Keith Stirling (keyboards).

The Upsetters 1968 - 1986
Bass:
Aston "Family Man" Barrett, Jackie Jackson, Boris Gardiner, Radcliffe Bryan, Robbie Shakespeare, Spike
Drums:
Carlton Barrett, Lloyd "Tin Leg" Adams, Lloyd Knibb, Mikey Richards, Sly Dunbar, Benbow Creary, Winston Grennan, Hugh Malcolm, Peng
Keyboards:
Glen Adams, Winston Wright, Ansel Collins, Gladstone Anderson, Keith Stirling, Theophilus Beckford, Robbie Lyn, Augustus Pablo, Mark Downie, Russ Cummings
Guitar:
Alva Lewis, Hux Brown, Earl "Chinna" Smith, Ron Williams, Ernest Ranglin, Willie Lindo, Michael Chung, Robert Johnson, Geoffrey Chung, Mark Downie, Tarlok Mann
Saxophone:
Val Bennett, Tommy McCook, Richard "Dirty Harry" Hall, Glen DaCosta, Lloyd Clarke
Horns:
Vin Gordon, Ron Wilson, Bobby Ellis, David Madden, Egbert Evans, Trevor Jones
Vocals:
Lee Perry, Dave Barker, Leo Graham, Max Romeo, Jah Lion