So, this is what I get from the episodes

1. Hokage
2. Sannin & some Rogue types like Itachi & Orochimaru
3. Anbu & Hunter Nin
4. Jounin
5. Chuunin
6. Genin
6. Academy students.

Is this about right? I'm not quite sure where Jounin stand.... And the levels don't always mean definitive superiority. For example, Oro killed the 3rd so to speak.