[Belegorn]

Originally Posted by cellurdur

We know this, because Tolkien called Feanor the mightiest of the Noldor.

Not only that, he is called the mightiest of all the Children of Ilúvatar [Sil. ch. 11, p. 112].

Originally Posted by cellurdur

Is there anything to suggest Galadriel was greater than Elrond?

Sure there is. It is said that "she was the mightiest and fairest of all the Elves that remained in Middle-earth" [Sil., p 370] for instance.

Originally Posted by cellurdur

Part of the difference is that Elrond is not an Elf.

Then Elros is not a Man if this is your logic. Elrond is an Elf, he chose to be so, as is said in Appendix A;

"At the end of the First Age the Valar gave to the Half-elven an irrevocable choice to which KINDRED they would BELONG. Elrond CHOSE to BE of Elven-kind"

Elrond is called the Half-elven because of his descent, but he IS an Elf, and chose to be so. Just has Elros is also called Half-elven, "Elros and Elrond, the Peredhil or Half-elven." [RotK, App. A] but he IS a Man because he chose to be so.

Originally Posted by cellurdur

When Tolkien writes of the Eldar, he leaves Elrond seperate.

From the Silmarillion, "In Middle-earth dwelt also Gil-galad the High King, and with him was Elrond Half-elven, who chose, as was granted to him, to be numbered among the Eldar" [ch. 24, p. 315]

Originally Posted by cellurdur

Why does he say that Elrond is the oldest of his race.

I would think because a group of the Númenóreans were Half-elven as well, though as we know they were in any case Men, in this case, High Men or Kings of Men, Dúnedain. Take for instance Erendis, a Númenórean, who says of the Men of Númenor, "Men in Númenor are half-Elves (said Erendis), especially the high men; they are neither the one nor the other." [Aldarion and Erendis, p. 216]