hello and welcome
as other just said if you consider making an army of Moria orcs ( GWS tends to distict the two the green ones are orcs, while the white flesh like hobbit movie are Goblins... whether this is good or not i leave to those who fond of books details but keep it in mind when google stuff up )
personally i bought a couple of job lots from ebay now i have more then 100 of moria orcs if you want a simple advice try to be a bit creative example the normal colours would be like green skin, brown leather and silver Armour..... you can have captain etc but to make life simple even to count etc one can follow a different colour for there leather such as light orange or even dirty blue.... plus for further help one can make distiction with what type of armour example 20 metal/ silver 4 gold ration with 1:5 ..( a bit roman empire style the)
a must have in moria set would be cave troll there a lot around on ebay... there is also the moria specific scenery which includes the door to Balin tomb 4 coloums the well and small piece like underground lock.....
IF you are into rare pieces etc try to check out a base where all the fellowship can fit around with Gimli over tomb etc..... i dont think its still in production anymore so if you found one just buy it it worth ( i could help you with colours etc there is also a set of around 9 videos how to paint from ground up
finally a nice fine cast also related to Moria would be the Balrog