The most awesome elf

[the phantom]

"Even now my heart desires to test my will upon it...and turn it where I would-- to look across the wide seas of water and of time to Tirion the Fair, and perceive the unimaginable hand and mind of Feanor at their work, while both the White Tree and the Golden were in flower!" He sighed and fell silent.

Great quote, mark12_30!

I'd also say Feanor. Remember how amazed everyone was by his silmarils. Even the Valar were dropping their jaws. And he made the palantirs (I know it was hinted at anyway) and there's a quote somewhere in LOTR where Gandalf, I believe, mentions that the palantirs were beyond Sauron's craft. Sauron was a great pupil of Aule, who was basically the God of skill and craft, and it was beyond his craft! That should say something.

Plus, remember this quote...

Then turning to the herald he cried: 'Say this to Manwe Sulimo, High King of Arda: if Feanor cannot overthrow Morgoth, at least he delays not to assail him, and sits not idle in grief. And it may be that Eru has set in me a fire greater than thou knowest. Such hurt at the least will I do to the Foe of the Valar that even the mighty in the Ring of Doom shall wonder to hear it. Yea, in the end they shall follow me. Farewell!'
In that hour the voice of Feanor grew so great and so potent that even the herald of the Valar bowed before him as one full-answered, and departed; and the Noldor were over-ruled.

Sounds pretty awesome to me.

And just because Fingolfin was the strongest doesn't mean that he could beat Feanor in a fight. Though Fingolfin was a bit stronger, Feanor was likely more agile and had more perfect coordination (the coordination is for sure, since he was such a great craftsman), and any fighting or weapons expert would tell you that that would give Feanor the greater advantage in a sword fight. Now, I'm not saying he would definitely win, but I'm saying that it's certainly possible. Remember, Feanor fought all by himself against a few balrogs for some time before he was finally struck down.

I'd definitely vote for Feanor.