Cirith Ungol

Shelob

Shagrat (Leader)
7 Mordor Uruk Hai
3 Mordor Uruk Hai with Two-Handed Mace

Gorbag (Wishes he was the Leader)
6 Orc Warriors
4 Orc Warriors with Spear
2 Orc Warriors with Two-Handed Weapons

Orc Captain
2 Orc Warriors

Moror Uruk Hai Captain


Just incase it wasn't immediately obvious, the theme of this list is Cirith Ungol, with particular focus on “The Fighting Pits”, and that really cool bit in the film where Shagrat and Gorbag are arguing over the Mithril Coat, and then Shagrat boots Gorbag down the ladder, and Gorbag proceeds to drop kick a black Uruk out of existence.
Trying to maintain the theme, I've kept them all armed as you'd have seen the in the film, with the exception of a few spears in with the Orcs. In particular, I've chosen not to use the absolute gem on an upgrade that is the Shield of Cirith Ungol for Shagrat, opting instead to use him completely stock, the classic model where he's holding onto the Mithril Coat, this particular model is also lacking Heavy Armour, so we've kept that off too.
Shagrat is being joined by a bunch of Mordor Uruk Hai, they pack a bit more punch that the Orcs in the list, so the certainly make Shagrat's warband pretty scary, but again, no shields since they weren't holding them in that scene, as far as I could tell.
Gorbag and his Orcs are in the same boat, no shields, and ready for the fighting pits.
The 2  generic captains are mostly there to fill out some points, but I like to imagine they're waiting to around to see who dies so they can feed them to “Her”.
And who is she? Why, it's Shelob of course! Can't have Cirith Ungol with out Her Ladyship herself! She's pretty self explanatory, big gribbly, likes to shoot webs and eat people. Nice lass, really.
I have visions of this list one day making it to the table, but with my Orcs and Uruk Hai to resentful of each other to help each other out... After all, what Uruk Hai would want spear support from “Orc Scum”!

The Last Alliance of Men and Elves,

Elendil, High King of Gondor and Arnor
4 Warriors of Numenor with Shield.
4 Warriors of Numenor with Shield and Spear.

Isildur
4 Warriors of Numenor with Shield.
4 Warriors of Numenor with Shield and Spear.

Gil-Galad, King of the Elves
7 Kings Guard

I'm going to start this by saying, for such a simple concept to a list, I absolutely fell in love with it whilst writing it. It's so basic, but it captures such a great part of Middle Earth history, the Last Alliance of Men and Elves, and the defeat of Sauron.
Whilst Rivendell offers up a host of exciting warriors and heroes for us to choose from, theres only really 2 I even considered for this. Gil-Galad and Lord Elrond, and if you ever feel like taking it for a spin, the two are completely interchangeable, aside from the access to Kings Guard, but you'll be able to bag yourself an extra Elf for the saving you'll make. For me, the choice was obvious, it had to be the High King of the Elves himself, Gil-Galad. You know he's good, you know he's got an obnoxiously good Fight Value. He's great, and he allows you to upgrade your High Elf Warriors to Kings Guard, buffing their Fight Value too, but also adding in an extra bit of flavour to the notion that this is part of the front lines in the fight against Sauron
I've opted for no shields or spears, and you better believe I'm going Two-Handed most of the time in hope of recreating the awesome bit of the first film where you see them spinning their blades around, slicing anyone who comes into their reach.
I couldn't take the King of the Elves without taking the King of Men, Elendil.
He's absolutely no slouch, and looking at his profile, it's clear Sauron got in a lucky shot when he knocked him down.
Rocking up with Narsil, a Master Forged Hand and a Half, that grants a free Heroic Combat each turn, Elendil can make short work of Orcs of any kind. If that was enough, he's backed up with a small retinue of 8 Warriors of Numenor armed with Swords and Spears, 4 of each.
Isildur, much like his Father, can certainly hold his own in combat too. We've not given him the One Ring, as thematically, it's still on the finger of Sauron. Like his Father, his retinue of 8 Warriors is 4 Sword and 4 Spear.
I can't see any other way to play this list than just rocking it all up as one big line, Gil-Galad lined up in amongst his Kings Guard, and Elendil and Isildur leading their charge from the front. Is it the optimal way to play? Probably not, but that's not what this is about!