Concerning Maeglin

[Maéglin]

Thus all seemed well withe the fortunes of Maeglin, who had risen to be mighty among the prines of the Noldor, and greatest save one in the most renowned of their lands.

Who was the greatest of the princes of the Noldor in Gondolin if it was not Maeglin? So whos is the quote referring to, Tuor or perhaps Turgon, but Turgon became king after Fingon died at the Nirnaeth Arnoediad so he wasn't really a prince anymore.