What I really like about this post is the authenticity part. If you were to ask me what my thoughts are on a charismatic person I would absolutely pick the other categories as a no brainer. But I would not have thought to add in authenticity.
And in fact I think this is the most important characteristic which you mentioned . Anyone can fake confidence or passion, or event posture. But the ability to really be strong enough to not be afraid to show your weaknesses is probably the most challenging part for any leader or any type a personality who wants to come off as confident and charismatic .