Who were the four people Jack Sparrow identified as having “tried to kill [him] in the past”?
Obviously the one who succeeded was Elizabeth Swann; Hector Barbossa marooned Jack twice, leaving him to die on Black Sam’s Spit; William Turner explicitly stated that he was ready to kill Jack during their duel in CotBP (“I practice three hours a day so that when I meet a pirate, I can kill him!”). Will also seemed prepared to kill Jack for the key on Isla Cruces in DMC.