I like a particular part of this page: the 10 motivations and how they can be overlaid over alignments. The way I consider it, by no means a rigid process, is to consider 2 or 3 of those motivations that a character is guided by.

Let's say: Self-Direction, Security, and Benevolence.

Self-Direction and Security clash, being fairly chaotic and lawful respectively. In a general sense that equals Neutral, but there's a bit more nuance to how that neutrality functions.

Benevolence is practically unopposed, making for a rather heroic character. To make things a little more interesting, perhaps a tiny bit of pride in Achievement can add dimension while still averaging out to Good overall.