I will start the ball rolling, Uncle Moses V. Nagamootoo is Snowball.

Snowball: Napoleon's rival and original head of the farm after Jones' overthrow. He is mainly based on Leon Trotsky, but also combines elements from Vladimir Lenin. He wins over most animals and gains their trust by leading a very successful first harvest, but is driven out of the farm by Napoleon. Snowball genuinely works for the good of the farm and the animals, and devises plans to help the animals achieve their vision of an egalitarian society, but Napoleon and his dogs eventually chase him from the farm. Thereafter, Napoleon spreads rumours to make him seem evil and corrupt, even claiming that he secretly sabotaged the animals' efforts to improve the farm.

Now let's name the some of the others, or which group they represent:

Old Major: An aged prize Middle White boar provides the inspiration that fuels the Rebellion in the book. He is an allegory of Karl Marx and Lenin, the founders of communism, in that he draws up the principles of the revolution. His skull being put on revered public display also recalls Lenin, whose embalmed body was put on display.

Napoleon: "A large, rather fierce-looking Berkshire boar, the only Berkshire on the farm, not much of a talker, but with a reputation for getting his own way", An allegory of Joseph Stalin, Napoleon is the main villain of Animal Farm. He begins gradually to build up his power by taking Jessie and Bluebell's newborn puppies and training them to be vicious attack dogs, whom he uses as his secret police. After driving Snowball off the farm, Napoleon usurps full power, using false propaganda from Squealer and threats and intimidation from the dogs to keep the other animals in line. Among other things, he gradually changes the Commandments for his benefit. By the end of the book, Napoleon and his fellow pigs have learned to walk upright and started to behave much like the humans against whom they originally revolted. In the first French version of Animal Farm, Napoleon is called CÉsar, the French form of Caesar, although another translation has him as NapolÉon.

Squealer: A small white fat porker who serves as Napoleon's right hand pig and minister of propaganda, holding a position similar to that of Molotov. Squealer manipulates the language to excuse, justify, and extol all of Napoleon's actions. Often attempting to confuse and disorient the animals, Squealer will make erroneous claims, like that the pigs need extra luxury in order to function properly. However, when questions persist, he usually uses the threat of the return of Mr Jones to justify the pigs' privileges. Squealer uses statistics to convince the animals that their life is exponentially improving. Most of the animals, having only dim memories of life before the revolution, are easily convinced. He is the first pig portrayed to walk on his hind legs.

Boxer: Boxer is a loyal, kind, dedicated, and respectable horse, although quite dim-witted. He is physically the strongest animal on the farm, but impressionable (a major theme in the book), which leaves him stating "I will work harder" and "Napoleon is always right" despite the corruption.

Clover: Clover, a mare, is Boxer's companion, constantly caring for him; she also acts as a matriarch of sorts for the other horses and the other animals in general (such as the ducklings she shelters with her forelegs and hooves during Old Major's speech). Clover, being more intelligent than Boxer, has doubts about the way the pigs are leading the farm, but stays loyal to the rebellion as she does not know how to express these thoughts.

Benjamin: Benjamin, a donkey, is one of the longest-lived animals. He has the worst temper, but is also one of the wisest animals on the farm, and is one of the few who can actually read. He is able to "read as well as any pig." Benjamin is a very dedicated friend to Boxer, and does nothing to warn the other animals of the pigs' corruption, which he secretly realises is steadily unfolding. When asked if he was happier after the revolution than before it, Benjamin remarks, "Donkeys live a long time. None of you has ever seen a dead donkey." He is sceptical and pessimistic, his most-often-made statement being "Life will go on as it has always gone on – that is, badly."

Moses the Raven: An old crow who occasionally visits the farm, regaling its denizens with tales of a wondrous place beyond the clouds called Sugarcandy Mountain, where he avers that all animals go when they die — but only if they work hard. He is interpreted as symbolising the Russian Orthodox Church, with Sugarcandy Mountain an allusion to Heaven for the animals. He spends his time turning the animals' minds to thoughts of Sugarcandy Mountain (rather than their work) and yet does no work himself. He feels unequal in comparison to the other animals, so he leaves after the rebellion, for all animals were supposed to be equal. However, much later in the novel he returns to the farm and continues to proclaim the existence of Sugarcandy Mountain. The other animals are confused by the pigs' attitude towards Moses; they denounce his claims as nonsense, but allow him to remain on the farm. The pigs do this to keep any doubting animals in line with the hope of a happy afterlife, keeping their minds on Sugarcandy Mountain and not on possible uprisings. In the end, Moses is one of the few animals to remember The Rebellion, along with Clover, Benjamin, and the pigs.

The Sheep: They show limited understanding of the situations but nonetheless blindly support Napoleon's ideals. They are regularly shown repeating the phrase "four legs good, two legs bad". At the end of the novel, one of the Seven Commandments is changed after the pigs learn to walk on two legs and their shout changes to "four legs good, two legs better". They can be relied on by the pigs to shout down any dissent from the others.

The Cows: Their milk is stolen by the pigs, who learn to milk them, and is stirred into the pigs' mash every day while the other animals are denied such luxuries.

The Cat: Never seen to carry out any work, the cat is absent for long periods, and is forgiven because her excuses are so convincing and she "purred so affectionately that is was impossible not to believe in her good intentions". She has no interest in the politics of the farm, and the only time she is recorded as having participated in an election, she is found to have actually "voted on both sides".

http://en.wikipedia.org/wiki/Animal_Farm