Let's be honest here. Any one of the shinobis (genin and above that is) can kill you, so they pretty much pose the same level of threat to you no matter how weak they might seem compared to others. That's why I have a few questions for you.
1. Who would be the scariest assassin to you personally and why?
2. If you get the choice of who will assassinate you, who would you choose? What method would you [want to] be killed by?