I believe you’re correct on Scientology which does not appear to use the Bible at all. I should verify my understanding of these religions before posting.
On Islam, according to http://www.dianedew.com/islam.htm
Islam Teaches: One of the 5 tenets to which Muslims must adhere is a belief in the 4 inspired books - the Torah (5 books of Moses), Zabur (the psalms), lnjil (the gospel), and Koran. The Christian Scriptures are incomplete without the Koran. In addition to the Koran, Muslims look to the Sunna (sayings of Muhammad), for inspiration. This collection is called the Hadith.
So I guess I was correct on this. (whew!) :O)
As far as the Orthodox Church goes this gets a little more dicey and judging by the definition I found at http://www.apologeticsindex.org/o06.html I’m not sure which column to place them in.
Orthodox Christianity: Generically the term orthodox refers to traditional, conservative forms of Christianity, upholding the traditional Christian beliefs about God as a Trinity and about Jesus Christ as taught in the church's early creeds. In this sense orthodox Christianity includes conservative Roman Catholics, and Protestant, evangelical Christianity, and is opposed both to liberal Christianity within Christian denominations and to the teachings of the cults. More specifically, the term Orthodox (with a capital O; or, Eastern Orthodox) refers to the state churches of Eastern Europe and the eastern Mediterranean who split with Roman Catholicism of the West largely over the issue of papal authority.
But if they wish to be put on the side with Against Sola Scriptura. I guess an updated list would be
For Sola Scriptura
Methodist, Baptist, Presbyterian, Luthern, Episcopalian, (In short any mainline Protestant denomination.)
Against Sola Scriptura
Roman Catholic, LDS, Jehovah Witness, Orthodox, Islam
As for numbers, well consider the following:
Please note that Christianity includes Catholics, Protestants, and cults. An excerpt from some of the statistical analysis:
Many Muslims (and some non-Muslim) observers claim that there are more practicing Muslims than practicing Christians in the world. Adherents.com has no reason to dispute this. It seems likely, but we would point out that there are different opinions on the matter, and a Muslim may define "practicing" differently than a Christian.
Size doesn’t make it right.