Here is some that I've missed from the above posts:
Genesis (6-29-80 MSG)
Genesis (6-30-80 Brendan Byrne Arena)
Ambrosia (7-22-80 Westbury Music Fair)
Styx (3-14-81 Nassau Coliseum)
Joe Walsh (6-19-81 Nassau Colisem)
Dan Fogelberg (10-18-81 Brendan Byrne Arena)
King Crimson (?-81 Town Hall)
Pink Floyd (?-87 Nassau Coliseum)
Siouxsie & The Banshees (10-20-88 Radio City)
Siouxsie & The Banshees (10-21-88 Stony Brook Gym)
Jethro Tull (11-3-89 Nassau Coliseum
Genesis (6-29-80 MSG)
Genesis (6-30-80 Brendan Byrne Arena)
Ambrosia (7-22-80 Westbury Music Fair)
Styx (3-14-81 Nassau Coliseum)
Joe Walsh (6-19-81 Nassau Colisem)
Dan Fogelberg (10-18-81 Brendan Byrne Arena)
King Crimson (?-81 Town Hall)
Pink Floyd (?-87 Nassau Coliseum)
Siouxsie & The Banshees (10-20-88 Radio City)
Siouxsie & The Banshees (10-21-88 Stony Brook Gym)
Jethro Tull (11-3-89 Nassau Coliseum