Hmmm, Finarfin or Fingolfin? Though Finarfin is the wisest and would make a fine king in peacetime the Noldor aren't living in Lala-Happyland anymore. They've come to Middle-Earth and there is war to be waged!
Well, it's quite obvious that Fingolfin is the most capable elf to become High King of the Noldor in times of war, no question about it, so....
++ Fingolfin
However, it is clear that the sons of Feanor, violent delinquents as they are, will continue to be a perennial thorn in Fingolfin's side, and none more so than Curufin, who is violent, manipulative, powerhungry and quite possibly insane. He needs to go. Perhaps a freak hunting accident? You know, with Middle-Earth covered in darkness all kinds of accidents can happen. Maybe someone will mistake him for a boar?
++ Curufin