Very nice list! I agree with your choices, although I'd have placed them in a different order.

Although one moment that will always stand out to me is Sephiroth's introduction. You're being held captive in the Shinra HQ, night falls and then... you wake up, the door is open, everyone is dead. What... the... hell... is... going... on. You have your fight with Shinra and all of a sudden something else appears that casually wipes them out. It really got to me. This scene is one of the main reasons why Sephiroth still is my favorite villain in the series.