I wish we heard more about Gil-galad. Can you imagine being the last of the line of kings of a doomed Noldor line? Sad tale all around but he seems to have been a good a just Elf. Brave too of course living under the shadow of Sauron and defying him.
This brings up an interesting mystery. Technically, Gil-Galad's heir was none other than Elrond, who was the great-grandson of the previous High King Turgon of Gondolin (Turgon - Idril - Earendil - Elrond). After the death of Fingon, Turgon became High King because Gil-Galad was still just a child. After the fall of Gondolin and the death of Turgon, the crown reverted to Gil-Galad. Since Gil-Galad left no heirs, the crown would once again revert to the line of Turgon, and hence to Elrond.
It seems to me that this was indeed Gil-Galad's intention, as he accepted the responsibility to foster Elrond and Elros after the Feanorian Oath at last claimed Maedhros and Maglor. Elros chose mortality and became the first King of Numenor. Elrond entered Gil-Galad's household and became the High King's herald and advisor. At the formation of the Last Alliance, Gil-Galad entrusted the ring Vilya to Elrond -- certainly an indication that Elrond was to succeed him.
My question? Why wasn't Elrond acclaimed as High King of the Noldor after the death of Gil-Galad? I'm hoping those of you who have had the opportunity to read HOME have some clues.
I can think of several possibilities:
(1) Elrond himself would not accept the throne, although he clearly accepted all the responsibilities of the crown, particularly the stewardship of the ring Vilya. He established the haven and fortress of Rivendell and provided protection to all and sundry who came within his sphere of influence, including eventually the northern heirs of Isildur.
(2) Elrond was not accepted as High King by the Noldor because of his mixed heritage, i.e., he wasn't "Noldor enough" or "Elven enough." This isn't to say that the other Kings of the Noldor were 100% Noldor. Several of them also had Vanyar and/or Teleri blood. But they were all fully elven.
(3) There was another equally viable candidate for the throne - Galadriel - and rather than create dissent among the few remaining Noldor, neither Elrond nor Galadriel took the crown. If Elrond were to be viewed as "not Elven enough" for the throne, then the line of Fingolfin would have been declared ended, and the Kingship would have reverted to the line of the youngest son of Finwe -- Finarfin. The sole surviving child of Finarfin was none other than Galadriel, and she CERTAINLY would have been an extremely powerful candidate for the throne of the Noldor.
(4) The Sylvan and Sindarin Elves opposed the continuation of the kingship of the Noldor in Middle-earth.
(5) Among the Noldor, were females ineligible to inherit the crown? If that is the case, then Turgon's line would have to end with Turgon himself, as Idril would not be eligible to inherit the throne. At Gil-Galad's death, the crown would then have to revert to the line of Finarfin, and since Galadriel was the sole surviving child, the line of Finarfin would also have come to an end. This would leave no one to legitimately take up the Kingship of the Noldor in Middle-earth.
Does anyone have a definitive answer to this question from their reading and research in HOME or UT? It has bugged me for a LONG time, and the various possible answers provide different interesting twists to the politics of the elves in Middle-earth.