1: Ah a nature god, I totally misunderstood him. Still interested in a pantheon, after all all people need a nature god to worship and the Kurthal are no exception.
2: Ok as a "nature" deity you may want to look at barbarian or druid, there are many others too.
Earth Dreamer 1-5:Spell caster that has a connection with the earth.
We jen: Asian wizard can specialize in earth, fire, metal, water, or wood.
Elemental Savant 1-10: Arcane spell caster that specialize in one of the four classic elements.
Wild mage 1-10: Chaotic Arcane spell caster that's spells are randomly stronger or weaker.
Dragon Shaman: A guy who emulates dragons and gains some of their abilities.
Bear Warrior 1-10: Barbarian that gains bear strength and ability when he rages.
Frenzied Berserker1-10: Barbarian that goes batshit insane when he rages.
Nature's Warrior 1-5: Druid that spent a little to much time wildshaped they get abilities that help them fight in wildshape.
Stonelord 1-10: Fighter that gets stone basted abilities (Awesome).
For prestige classes there I put how many levels for it there are in it.
I got more I will put up in a bit, but can you tell me a bit more about your God, what he wants what he does?