There is too much varience -- for instance the Luthernas believe in the True Presence of Christ in the Eucharist and have an episcopate, while others don't, while some "protestant" groups like the Oneness Pentecostals reject the Trinity and other groups that by theology seem "protestant" like the Baptists say they aren't (ok, SOME baptists say they aren't Protestants)
I prefer the term non-orthodox.