1. Ranger/Cleric, i really love this i almost got everything great fighting skills, great defense, great spells, stealth, racial enemy, turn undead,to much to name it all i really like it if u didn't play it yet go play it.
2. Assassin, great back stab (i love backstab) and the poison is really good.
3. Sorceror, spell caster powerhouse, but it becomes boring ad the end.
Kensai, Undead Hunter, Archer, Bard and Monk are other classes that i think are really good but i didn't play with them yet.