I'd not place Stannis anywhere near Chotic Good, although Ned is a classic example of Lawful Good equaling Lawful Stupid.The Rainmaker said:Chaotic good, just because that's how I feel Stannis Baratheon is like. Ned Stark was lawful good and that just ended with him fucking everything and everyone up.
I'd place Stannis as either a true neutral, or perhaps lawful neutral. He's far too willing to do Bad Things in order to increase his own power to call him good, and though his sense of justice is rather harsh and/or twisted at times, it's still present enough to keep him from being chaotic.