[Bertram Anders]

If you are looking for LE deities this thread lists all the deities that are available for selection on the server. That being said, all of those may not have temples in Thay.

As Ninja stated above, avoiding chaotic actions is the best. In general alignment shifts should be gradual, so losing/gaining a few points here and there shouldn't hurt you too much. Just learn what chaotic actions are and avoid doing those or being around those that do.