I feel there is an option missing. I don't think "lawful" follows or adheres to the moral codes
and mores of society any more than someone who is neutral or chaotic. The difference is, they will feel more guilt by not following the normal morality of their society. Here are some examples:
- The classic priest that always wants to do the right thing, and most of the time does, but finds himself sneaking to the brothel every now and then.
- The poet that always sympathizes and has deep empathy for those hurt around him, but he often can't see his own actions harm the ones closest to him. He gives coin away to his friends, so they have something to pay with, but also forgets that his wife needs the coin to fix the house.
- The empathetic judge who follows all the rules of his court and king, but then always seems to break them when the person before him is a teen.
If you need an evil example: a city-gate guard who is a strict rule follower, but still takes bribes from his two friends even though it is illegal. Because, you know, there his, bros.
So lawful follows the codes of the land, rules of the kingdom, norms of the community, morals of the church, and mores of the culture, but breaks them just as often as the others. They just pay a heavier price emotionally because of it. This might make them swing harder on the lawful spectrum for the next few days, or weeks, or months. Until, of course, they break it again.