These days, at least, "lawful" isn't necessarily about following the laws of "the system". That's one set of laws, but it isn't the only one you can follow. A lawful character holds to tradition, keeps their word, and otherwise wants things to first and foremost be organized, to follow a plan. For the lawful character, individual choice is unimportant, being a cog in the machine is important.

Nathan registers as lawful to me. He, first and foremost, plays the game, and he knows the game has rules. He constantly has issues with his brother, who keeps bucking against The Plan. I his younger days he may have been Good, but these days he's morally ambiguous.

Mr. Bennet is not Evil. Evil is selfish, self-aggrandizing, profiting from harm done to others. Mr. Bennet is not looking for personal power. He doesn't really like to do harm, but feels it is necessary to keep order in society. He acts to protect others - his family first, society second. That seems pretty LN to me. As compared to his new partner, who gets jollies out of causing distress - she's Evil.

Hiro is Neutral Good. He sometimes follows personal choice (like quitting his job), but he also often sticks to a Code. He follows the way things should be, for a superhero. Chaotics deny the existence of Fate, or Destiny, while Hiro seeks them.