Nazgul-Were they still Men?

[Mad Baggins]

When the ring was destroyed, their bondage to the ring was over. At that time, they died or passed away.

I have another question. When the Ring was destroyed and the Nazgul passed away, did they become good again because Sauron's dominance over them was destroyed? Or, because of all the years they had been enslaved by him, did they remain evil as spirits?

Or could the Nazgul be subject to other things Men are subject to?

And I think that all men, be they Wraiths or no, are still susceptible to greed, flattery, lust, etc. The Nazgul were still men (although wraith-men) but as the Saruman quote from earlier on shows, they can still trust in people whom they perceive as allies. So if they can trust, can they not be greedy?