Noldor Man's saviours?

[Kuruharan]

Feanor's rebellion was not in itself an evil act (in my opinion), although it was a rebellion

But it was though. And not just because it was a defiance of the will of the Valar. There was another issue involved, Feanor's greed and possessiveness.

The driving force behind his revolt was his lust for the Silmarils. The whole expedition was founded on impure motives. Nor were the other leaders of the Noldor entirely free from taint. Many of them went East because they wanted to be kings (or queens). This type of quest for self-aggrandizement is little different than some of the motives that drove Melkor.