The order of light. Called heretics, traitors and cowards by many different factions. The truth is far different than most people understand.

LORE

The order of light has been the silent power in High rock for centuries. After the Great War their influence spread throughout all of the empire, even up to the Elder Council itself. Many members come from poor or working class families, but there are many Nobles. there are ranks like in many other guilds with the highest rank being Light Bringer, the leader of the Order. The ranks are spread among the five houses of the Order:

House of Justice: This House represents the Justicars, or paladins of the Order. They are the guard force for many of hidden sanctuaries of the Order throughout Tamriel. Skills: Heavy armor, 1 handed, Restoration, Archery, Block and Smithing (if possible)
General build: http://skyrimcalculator.com/237681

House of the Dragon: A strange name for a house, this group is the crusaders of the order. They are most seen of the members. They are often armed with 2 handed swords or hammers and heavy armor to make up for a lack of a shield. Skills: Heavy armor, 2 handed, Destruction, Restoration, Speech. General Build: http://skyrimcalculator.com/237683

House of Faith: It does not matter who you worship when you Join the Order of light. Faith is important, and the house of faith is the warrior priest house. Armed with mace and restoration spell, they are capable of healing any injury. Also wear light armor for protection. Skills: 1 handed, Light armor, Restoration, Alteration, Illusion, destruction (DO not Perk, use Staves mainly). General Build: http://skyrimcalculator.com/237690

House of Enchantments: The mage's house. These members are masters of combat magic and are usually never without an atronach. As masters of enchantments and magic, they are never wearing armor, robes are their usual attire. Skills: Enchanting and all schools of magic but Illusion. General build: http://skyrimcalculator.com/237696 (three perks left for you to choose your own elemental school in destruction)

House of Shadows: This house is the spy network and assassins of the Order. Preferring to stay our of harm's way and remaining in the shadows, they watch Tamriel for signs of Corruption, and eliminate it. Skills: Archery, Light armor, sneak, 1 handed dual wield, Alchemy. General build: http://skyrimcalculator.com/237701

Today, with the Civil war in Skyrim raging, the order has decided to expand their influence in Skyrim, backing the most influential families in Skyrim's major holds.

(feel free to edit the builds as you see fit)