Hi all, here's the deck that has won the last two Expanded Leagues on Gemp. Be warned: you won't make friends playing this one, and it is fairly complicated to get it just right, but it does win. A lot. I only use it for leagues, where I believe anything goes, but never casual games which I think should be for getting something a bit off the metagame.
Ring-bearer: 
Galadriel, Bearer of WisdomRing: 
The One Ring, The Great RingAdventure deck:
Buckland HomesteadThe AngleWoody-EndHill of SightCaras GaladhonOld Forest RoadDammed Gate-streamTrollshaw ForestSirannon RuinsFree Peoples Draw Deck:
1x 
Arwen, She-Elf (starting)
2x 
Cirdan, The Shipwright4x 
Gil-galad, High King of the Noldor2x 
Glorfindel, Eldarin Lord1x 
Smeagol, Poor Creature (starting)
1x 
Gamling, Defender of the Hornburg (starting)
1x 
Asfaloth, Swift Blossom3x 
Elven Armaments1x 
Coif1x 
Erkenbrand's Horn1x 
Galadriel's Silver Ewer1x 
Gift of the Evenstar, Blessed Light1x 
Nenya, Ring of Adamant4x 
Attunement3x 
Final Shot2x 
One Good Turn Deserves Another3x 
Something Slimy4x 
Hosts of the Last Alliance2x 
Leaving Forever1x 
Secluded Homestead1x 
Shadow Between1x 
Songs of the Blessed Realm2x 
Strength of Arms1x 
Uncertain Future1x 
Follow Smeagol4x 
There's Another Way2x 
Celebring, Elven-smith1x 
Woodhall Elf, ExileShadow Draw Deck:
1x 
Bill Ferny, Swarthy Sneering Fellow3x 
The Witch-king, Captain of the Nine Riders1x 
The Witch-king, Morgul King1x Úlairë Attëa, 
Keeper of Dol Guldur2x Úlairë Cantëa, Faster Than Winds
1x Úlairë Enquëa, Lieutenant of Morgul
3x Úlairë Enquëa, 
Sixth of the Nine Riders3x Úlairë 
Lemenya, Eternally Threatening4x Úlairë 
Nelya, Third of the Nine Riders3x Úlairë Nertëa, 
Dark Horseman3x Úlairë Otsëa, 
Duplicitous Specter3x Úlairë Toldëa, 
Black Shadow2x 
Ring of Terror2x 
All Life Flees4x 
Dark Approach1x 
Return to Its Master3x 
Too Great and Terrible1x 
Flung Into the Fray1x 
Ghastly Host1x 
Hatred Stirred4x 
Lost in the Woods2x 
Moving This Way1x 
Out of Sight and Shot2x 
They Feel the PreciousThe Free Peoples are centred around 
High King of the Noldor.  It's boring, but he is just that good. Bid 0 and start 
Dammed Gate Stream if you go first or play it when possible. Gamling pulls his horn, exerts twice to pull the 
Woodhall Elf and 
Celebring, Elven Smith who should pull 
Gift of the Evenstar, Blessed Light if you think you can win a skirmish, or The Silver Ewer if you don't feel so bold.
But don't kill Gamling just yet. Blow his horn once again to discard 
Celebring, so that once you pull the 
Coif next turn, you can call on 
Celebring again, and he will give you the other artifact. Then let him become a disappointing snack to the biggest minion on the board (though he can be kept alive against Troll Swarm if you really like).
Keep Smeagol alive as sitepath control is key in Expanded. Once you have 
Songs of the Blessed Realm out (can be pulled with 
Something Slimy) 
One Good Turn Deserves Another will be essentially free, but 
Follow Smeagol works well enough until then. 
There's Another Way is a great card for getting forests out, and also strengthens Smeagol, which does help a lot against Nertea.
When you have Gil-Galad out with a few forests (or rivers), you can remove all burdens, discard all Shadow conditions and set up the perfect hand each Regroup phase by looping 
Secluded Homestead and 
Uncertain Future with 
Leaving Forever. 
Gift of the Evenstar allows you to reset everything if 
Saruman's Power hits.
Note this deck has strengths against most things. Arwen can kill any big minions without batting an eyelid, and the is so much wound prevention that Archery falls fast. The only real problem I've had is Grond as there is no possession discard, but if you play well there shouldn't be any Sauron minions alive at Regroup.
The Shadow is a mix of Forest and Threat Nazgul. I find that they are pretty destructive, particularly in the late game when there will be a few Forests on the board. The only thing to say is that when playing against 
Powerful Guide (who you will see a lot in leagues), make sure that Grimboern is not allowed to keep his axe. Keep discarding it with Cantea and you will eventually wear them out. Otherwise just keep hitting the Fellowship with several chunky minions per turn that can swarm so will late game.
If you opponent tries to run, you can set up the perfect hand by drawing tons of cards with 
Leaving Forever. You can play 6 
Dark Approach in a turn with the 
Ring of Terror and 
Black Shadow, meaning you can get 7 minions out for only 4 Twilight with perfect set up! 
Too Great and Terrible is there as Gandalf is so popular.
Feel free to comment or use this deck, though I'll be annoyed if I end up playing against it too much in casual. It does take some getting used to, however. It's a big deck, but it cycles so well (and you pull so many important cards out of it, anyway) that you never really feel clogged.