I'd definately say that at least Ulmo is involved. I'm sure he'd be waiting to see what Aragorn would do and try to help him subtly- after all, there would be no Aragorn if it wasn't for Ulmo. And also he's never abandoned Middle-Earth the way the other Valar did (He's the "chink in the armour of fate" or something like that).
As well as this, I think it is referenced that Ulmo was closest to Manwe out of the Valar (in terms of friendship, or whatever it can be called for Valar), so it could be assumed that he probably could have persuaded Manwe to join his cause, which would also (not incidentally) change the outcome of a major battle.
|