Platinum Pokemon help?

Based on what is already on your team, I guess Luxray. He has an awesome attack stat. Then again, there aren't many physical electric moves and he's one of the slowest electrics. Dusknoir is an ok tank, can hit pretty hard and has HUGE defenses, but has TERRIBLE HP and equally bad speed, so he can be one hit koed by psychic or shadow ball. So, out of the two, luxray is the best. However, I would consider something else like zapdos or jolteon, if you can.