What beliefs would we consider reasonable for a self proclaimed Christian to hold?

[Jenny A]

It may be more accurate to say that Protestants use a bible with books subtracted from it. Martin Luther removed several books from the OT canon. At no time did Catholics add any books. He also wanted to remove several books from the NT (like James and Revelation) but his followers at the time didn't support this revision, so he didn't end up taking them out. I like to point this out to Christians: your one source of inerrant truth is the way it is because of the politics of the past.

Also, where do you get that evangelicals "only have the new testament"? This is incorrect. I wouldn't think these are errors you'd make, Huggy. Am I misinterpreting your words here?

*emphasis mine*
My fault for being unclear, the evangelical-heritage version of the bible only has the new testament and psalms.

The evangelicals I know would be very surprised to hear it. Evangelical is not a denomination and does not have a separate bible. Many Baptists, Methodists, Presbyterians, and Lutherans are evangelical. They consider salvation through grace and faith in Jesus central to thier beliefs. And while they do tend to emphasise the Gospels, they haven't thrown out the rest of the Bible. To the contrary, they are often belivers in Biblical inerrancy.

Perhaps you have mistaken The Good News For Modern Man translation of the New Testament for rejection of The Old Testament? It wasn't and isn't. It is now published complete with Old Testament as The Good News Bible.

Edit: I looked up The Evangelical Heritage Bible. Like Good News For Modern Man it's just the first books published in an ongoing translation. https://en.m.wikipedia.org/wiki/Evangelicalism Naturally, they began with they consider most important.