Here's how it stands for me:

Arnold Schwarzenegger, by virtue of not being the Nexus, is more suspicious.

Vin Diesel, through his position as an "added" account but also seemingly meant to be in the game, is more suspicious.

Uma Thurman, despite my proclaiming of her innocence, has a roleclaim that cannot be confirmed.

Bruce Willis is town aligned. It would not make sense for the Mafia to have two roleblockers, and it would not make sense for Uma Thurman to lie about her role if Bruce Willis is not what he claims.

Sylvester Stallone and Harrison Ford are probably what they say they are. I can only imagine that extra townies were added to compensate for a strong Mafia.