Guy Lombardo
On November 5, 1977, Lombardo suffered a fatal heart attack. Another source says he died "of a lung ailment." His wife was at his bedside when he died in Houston Methodist Hospital.
Silvio Dante
In the episode "The Blue Comet", it is revealed that the Lupertazzi family has recruited Burt Gervasi to begin a rebellion against Tony. Burt goes to Silvio to join in a coup d'état against the boss, but Silvio responds by strangling him to death at his home a short time later. Eventually contracts are put out on Silvio, Bobby Bacala, and Tony Soprano in order to decapitate the leadership of the family. Shortly after Bobby is killed, while Patsy Parisi drives Silvio outside of the Bada Bing club, a car moves in front of them, with two men coming out shooting multiple times. Silvio tries taking a pistol off of the back seat, only to be shot in the back. Silvio manages to grab his pistol in time while Parisi holds them off. Parisi manages to defend them, but soon the two men begin to target Silvio more. He is shot once more in the chest, while Patsy runs into the woods, fleeing for his life. Afterwards, Silvio is rushed to the hospital and placed in an intensive care unit.