Who are the good guys?

[Luka]

'kay, so if we apply this as a principle, a Corsair is "lawful-good" too, as he adhere to his home laws... And again, if you ask a 'Sair his laws are far more "fair" than Rheinland Laws.

You sense the confusion / lack of logics in condensing the complexity of morality to a five-point scale?

If he adheres to his home laws strictly then yes he is, and he may think his laws are more fair than rheindland if he fights them, however he's still vulnerable to the dilemna of lawful or good.