Nice.
As posted, get Aragorn into some fights with a few Dead attached and declare Heroic Fight. Slaughter that foe and spread out to engage multiple enemies. Be careful you don't get surrounded, and try to keep numbers on your side when you can and you should do well.
But don't rush to melee if you have ranged fire on your side. All 14 Grey Company have bows too, right? That's 15 shots which gives volley but then some strong direct fire. And with the free Might from Aragorn if you have nothing better to spend it on you can even boost his shots to help ensure Wounds if needed.
So shoot them up while you can, then let Aragorn and the Dead form your main contact with the enemy while the GC flank. Have them continue to shoot as much as they can and be sure they support each other when the fighting starts.
I think a lot of your opponents may be well intimidated simply from the composition of your force, so be sure to use that to your advantage as well.