Probably the most influential, especially on the north side of the island, will be the Church of Bazadan, "The Just One". Initially brought to the island when it was a colony of "The Empire", it is now a separate church with it's own hierarchy from that of it's "parent" church. In the remains of the empire, the Church of Bazadan is referred to as "The Hand of Justice."
Clergy are known as "The Just Ones" or "The Hands", mostly by the average peasant and town folk, and nothing is quite as exciting as watching a "Hand" disembark from a merchant ship in Tenkar's Landing coming to blows with the local "Just Ones." "Hands" and "Just Ones" see the other as heretics.
The "Just Ones" are invariably armed with long sword and shield, and their shields are usually painted with a fist holding a sword upright. The "Hands" usually wield maces, but have been known to wield other weapons that have been bloodied in previous battle but now deceased heroes of the faith.
On the island and in the remains of the empire, Bazadan is worshiped, or at least prayed to on occasion, by members of the military, mercenaries, town guard and watch and the nobility. His name is invoked prior to any trial to ensure that justice is the final result.
From a rule perspective, "Just Ones" are required to wield long swords. They also find it difficult to lie, preferring silence to intentional deception.
Next up will be a nature god of sorts...