I think Delta is probably like me, a person who likes to wait until everyone else has picked so that they can balance out the party.
Cancerman is right, in that you, as a party, don't need to worry about "filling the holes" and covering roles, because I won't throw anything at you that is insurmountable based on whatever skills and abilities the party has.
So you truly can choose whatever character you've wanted to play. A fighter or paladin would be just fine, as would a magic user if you want to branch out. The most important thing is to choose something you will have fun playing.
If you still want to focus on balancing the party, you might think about out-of-combat roles. :)