If you do not know the appropriate mode of address for his or her denomination (pastor, reverend, brother, father, etc.) then "Doctor" would be appropriate. Usually "Reverend Doctor" is the formal address, as it is less misleading regarding profession.
Reverend Doctor
A dentist can either have a Doctorate of Dental Medicine (DMD) or Doctorate of Dental Surgery (DDS). The proper salutation for a dentist is Doctor.
EdD indicates a doctorate degree. Proper salutaion would be "Dear Doctor xxxxx:"
There is no general or standard salutation for an individual with a masters degree, like you would have with a doctorate degree. In other words, Dr. John Smith.
He should be called Superintendent Bertram, as that is the position he holds and his doctorate is a qualifying prerequisite.
Baptist is the proper adjective for Baptist.
What is the proper salutation for a register of wills, e.g. Honorable John White?
the correct salutation for two men is Messrs
Hello.
Your Honor
Dean actually is the proper salutation. One could say: Dean Redmond, would you please sign this form? Alternatively you could just use the Dr. salutation or the Professor salutation if those are appropriate, which they generally are.
The proper salutation for a doctor is doctor or professor depending on their title. In writing the short form can be used which will be Dr. or Prof.
A proper salutation for greeting the president of a business is "Dear Mr. President". To conclude a letter, the proper word is "Sincerely" and a the name of the writer.