Trying to figure out who falls into what category of Christian is made even more confusing by the fact at most Christians of all denominations consider themselves the one true catholic (universal) and orthodox (correct) church - though many of them admit to not being apostolic.
I am thinking maybe we Christians should come up with a new way of identifying each other's beliefs - our commonalities and differences - I am talking about the ecumenical councils - churches can identify themselves as to how many of the ecumenical councils they uphold as part of their faith.
Starting off with a false, blanket statement regarding Protestant (and other) denominations will only weaken any argument or suggestions that you might posit.
Might I suggest an alternate method to identify Christian denominations?
My idea is more precise. For example, the Greek Orthodox Church can claim to be charismatic - a Greek word - baptist - a Greek word, episcopalian - a Greek word - presbyterian - another Greek word.....