An ideal western army

[Inziladun]

For one thing, concerted action by all those you name would have been quite unthinkable. The overriding theme in the Third Age seems to be one of a distancing between Men and the other races.

Even if the possibility of a Grand Army of the West is granted, I can't see it succeeding against Sauron. The Last Alliance with the cream of the crop of the warriors of Men and Elves was barely able to eak out a victory previously.