Kindly put, you know not of what you speak. What tenets of the Christian faith do Quakers deny? There are three main branches of Quakers; only one is liberal/modernist. The other two are moderate-evangelical, and conservative evangelical, these two being quite orthodox; they do not deny any of the central tenets of the Christian faith.
I've heard all kinds of false charges against the Quakers, but the Montanist one is a new one to me, and quite ridiculous.
The Salvation Army, strictly speaking, is a church (denomination) first and foremost and a Christian service organization second.
Seriously, you need to study this more. Everything you said is incorrect.
I apologize for not responding to this earlier. I am on the road a lot and frequently miss posts.
Montanism was a prophetic movement that ran the gamut between wild and ecstatic utterances and a more serious-minded intellectualism. It is the ancient forerunner of a number of Christian sects; most notably the Pentecostal/Charismatic movements and - yes- Quakers and Shakers. In spite of their denials the Shakers were an offshoot of Quakerism. If you want to press the issue I will be more than happy to provide you the history. But my main point stands; Quakers are outside the bounds of orthodoxy in many areas - from ecclesiology to soteriology.