[Roa_Aoife]

Initially, I was just going to pick Isildur as an obvious yes. Then, I read down the posts, and reconsidered. After a second reconsideration, I'm going with my first choice. Allow me to explain:

Gil-galad and Elendil may have knocked Sauron down and "disabled" him, as it were, long enough for Isildur to come in and do his hand-choppy action. It was the loss of the ring that cuased the loss of the physical body. Why? He had poured som much of himself into the ring that with out it, he no longer had the strength to maintain a physical form. That sort of thing takes energy, and the sudden loss was like getting the wind knocked out of him. He needed time to recover, to gather strength with out the ring before he could take any shape whatsoever. Even then, his physical form was far more limited than it had been with the ring. (Come on- he was a giant eye, for goodness sake. What could he do, blink at his enemies?) He had to rely on his other abilities to get anything done, the foremost being the ability to get his cronies to do the physical work.

To summarize- the loss of the ring cuased the loss of his power to overcome entropy, and since Isildur caused it, he gets the credit. Way to go Gil-galad and Elendil with the assist.