We currently have a Cleric, a Ranger, a Rogue, and if Video's still on board, a Fighter, in case that might influence your decision.
A Half-Elf male could certainly hate elves with the story's background.
A Gnome would come from outside the country, and would be unheard of by most people, mostly mistaken for a large halfling, or perhaps a very slender Dwarf.
I actually don't encourage classes that highly resemble hunterlike features. You're a group, and will have to work as a group to deal with the encounters. Considering your goal, a Ranger is pretty useful, but Zaer has that covered. For the rest, it works out better with an Arcanist, a Divinist and a Skillmonkey, like normal. Most is actually covered, save for the arcanist, which is not required perse, considering it's relatively lowlevel, so pick whatever class you like.