[Mithalwen]

It seems a shame to give a curt response to an opening post on the Downs (welcome by the way) but it seems a clear "no". The Numenoreans were great among men physically and with their longer life spans but they are shown at their strongest compared against lesser men and later generation elves. No disrespect to Gil-galad who was clearly a great warrior, but perhaps not quite equal to the likes of Fingolfin who had dwellt in Aman. In the third age Glorfindel (accepting Tolkien's later conclusion that he was Glorfindel of Gondolin reborn and returned to Middle Earth as a champion of the Valar) was almost certainly the most powerful Elf warrior remaining and notable as such. In the first age he, while rightly celebrated for his valour and battle with the Balrog he is not so remarkable - more one tale of courage in arms among many.

I suppose it is comparable maybe to the influence the Grey Company had on the War of the Ring. The Dunedain of the North and the sons of Elrond were worth more than many times the headcount of lesser men and were vital in the role they played in the Battle of the Pelennor but Sauron would not have been overthrown without the destruction of the Ring. The Numenoreans could have been useful in holding off and depleting Morgoth's army but I don't think even an unlimited number of them could have overthrown Morgoth himself without the assistance of beings of equal status.