You are handling this the best way possible. In addition to the incidents that you are documenting give HR a list of people who were witnesses to them. Especially those that emailed you or came to your desk to ask if were ok. They were probably exposed to other outbursts that you are not even aware of and this can be used to establish a pattern of behavior.
Be strong and think about this as part of your recovery where you no longer make excuses for other peoples actions. They are not your fault.
Your friend,