Nice work, Alopex. Of course, there's about a hundred other roles and even more variations out there, but I think you got most of the basic roles which is good for noobs (and even older players who need a refresher).
Some feedback for you (if you don't mind):
I would also include the mason recruiter, mason, usurper (related to the Godfather role) and siblings roles.
If you're including aliases and flavor roles, such as Angel, you should either make a color key or remove the blue, so people who don't know any better don't mistake it for an alliance color.
The Hunter role wasn't exactly like a vigilante, so I'm not sure if it's an official alias for that role.
You might want to mention a variation of the arsonist where they "prime" their targets one at a time each night before detonating and killing all of them at once. If the firefighter targets someone who's been primed, they are longer primed.
I may be wrong on this, but I always thought the Mafia Goon was the equivalent of a vanilla townie, and it was the hit-man who did the killing.
You may want to clarify that the host is considered the "moderator". The difference between the host/game moderator and the forum moderator (Draggy, other EB staff) might be confused.
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Again, thanks for doing this. I really like how you did those little vignettes, they add a lot to this handbook, and differentiate it from the mafiawiki role guide.