Oh wow. I only know a little bit about this, so if some people disagree, I’m sorry! 

Lawful Good (The Crusader): Scott McCall, Mason Hewitt, Melissa McCall
Neutral Good (The Benefactor): Lydia Martin, Sheriff Stilinski
Chaotic Good (The Rebel): Allison Argent, Kira Yukimura, Liam Dunbar
Lawful Neutral (The Judge): Derek Hale, Jordan Parrish, Chris Argent
Neutral (Undecided): Alan Deaton, Marin Morrell, Corey Bryant
Chaotic Neutral (The Free Spirit): Stiles Stilinski, Isaac Lahey, Malia Tate
Lawful Evil (The Dominator): Jackson Whittemore, Deucalion, Jennifer Blake
Neutral Evil (The Malefactor): Peter Hale, Kate Argent, Gerard Argent
Chaotic Evil (The Destroyer): Theo Raeken, the Nogitsune, Matt Daehler

Yeah I gave Jackson an evil alignment because I don’t like him. I could see quite a bit of flexibility in a lot of these placements (especially Kate, Liam, and Gerard).

Sources: 1, 2, 3.