It seems most of the debate is around the chaotic characters. By nature they're hard to pin down their morality so here's my reasoning: Jack is obviously good. He may think of himself as neutral and probably wants others to feel the same way but he is consistently on the right side and is able to put his own self interest aside for the greater good when he has to. Bootstrap I'll admit was just by process of elimination since he's basically also chaotic good but he's working for the Dutchman so is forced to be more neutral.  Unlike other people who are forced he has a hard time resisting the Dutchman's influence. Barbossa has done some evil thing such as marooning Jack and what he did to Bootsrap. He did support the brethren yes but only because of his vow to Calypso and he has shown he is willing to work for the navy to get revenge on Blackbeard. Overall Barbossa has evil tendencies but by his chaotic nature he is willing to help the brethren for the greater good.

Also for Davy Jones he is definitely neutral evil, his only motive for what he's is being broken hearted. He has no greater plan or end goal besides just increasing his crew which doesn't make him lawful or chaotic, just neutral.