Need a 5th Class!!

How about Wardens or Avengers? Guardians of Nature who seek to purify the land. (Fits a classic ranger model)

Love the idea of bow toting monks.

Did you ever see the Samurai Jack episode with the blind archers.
That could be a pretty cool little sect (class) to play with.
They took a vow, had their eyes plucked out, learnt to navigate their environments using sonar clicks (this is actually possible) They can smell and hear and sense evil and aren't decieved by their eyes. Works nicely with a monk like ethos of discipline.

Diluvian

Plenty

when i'm thinking of shepard, i'm going straight to druids. and i think it would be creative not to use animals (although really cool) but to summon elementals. Like an earth elemental or plant elemental. Definitely has that nature's revenge against demons feel.

Depending on how you do the story with the deamons you could make the fifth the assasins guild. If the other clases have evolved into deamon hunters why is there no profesional one? I bet people would be willing to pay a handsom fee to be rid of a pesky deamong so why not hire youre self a deamon assasin?

The clas is a mixed range/stelth class, hide in the shadow and hit the deamon with trowing daggers, blowdarts och bow and arrow coverd in holey water or what ever is good against this particular deamons. Or they might just aswell sneek up behing you and slith youre troat with one of there manny daggers. (so it is eather ranged or close up and personal for this one, depending on how the range works in the game)

To me exorsists is mor magic based, doing different rituals. And to me that takes time so being an exorsist trying to get rid of a free deamon seems a litle risky. Or Im I the onley one who thinks about exorsists in this way?

I vote you call the class the Pilgrim: It would be a holy wanderer who is skilled in surviving the hellish country side. The word also invokes the likes of Van Helsing and V for Vendetta in my mind. Both also happen to be good at cloak and dagger with V being good at "kara-te" and Van Helsing having toys.

I have no clever ideas for the archers. But as for the wolf leading animal masters, "Wolfherds" would be a more apt name.

The Templars: Knights that were abandoned by a world they saved by losing the most holiest temple of their kingdom. Abandoned, they fled into the unknown regions of the world to continue to hunt and destroy demons before they destroy more worlds.
(Swords, spears, shields... etc... )

The Edomites: Thought to have been long dead, these descendants from ancient shepherds south of Judah developed their control of animals and people to fight demons. They battle with the mastery over the heart and soul; able to twist hearts against themselves or lift them into oblivious joy.
(mind control and manipulation)

The Ascetics: Those who gave up everything worldly, and were blessed, through self abstinence, with the power over evil; able to wield purity in fierce wrath of righteousness.
(toughness, holy conjering of divine spirit)

The Franks: Considered "barbaric warriors" by the Roman's, but through faith they now live to slay demons centuries later with their fracisca's that can tear a mans head into fragmented sausage meet with direct aim, or often even more devestating with indrect aim. Their vial weapon is only equaled by their brutal and chaotic persona in battle. At times it is hard to tell who is more evil; the Franks or the Demons. Luckily, the Franks hate the Demons.
(Axes, hammers)
(seriously; look these guys up)

The Englishmen: (statistics are derived literally from historical fact) By law, every Englishman is required to be proficient with the long bow (a weapon 6 feet tall and capable of 150lbf, capable of up to 400yrds). And with no practice range being allowed smaller than 200yds, their shear power is matched with incredible accuracy capable of penetrating even some of the heaviest armor. This is what is brought to their blessed command to defend against Evil by riding it from the world with their arrows of divine judgement and truth.

I tough in the Exorcist too.

Exorcist: This scholars fights the demons with his mind and will. Rituals, holy vials and chants are his/her weapons.
Often they have complete book of the layers of hell and exploit the weakness of the demons.

Vessels: This common folks have accepted an angel to posses them in order to fight demons. The Vessel can do divine damage to demons and resist much of his powers. Faith, Resolve and his divine soul are his weapons
(Something as Castiel and the angels on Supernatural)

Demonoligist: This are survivors of demon's massacres or possessions. They create a unique link with the demons gaining some of his strength and abilities. They fight fire with fire. Strength, magic and demon servants are his weapons.

Hope you like one of this.
Roy

Inquisitors: Hired by the Evil king to hunt demons to be able to learn and control them. Uses bows, crossbows and nets. Provides an evil-ish class to play with.

Perhaps Diablo