Alright, given the hypothetical.
Your first question is a good one. It is quite a challenge. First I would say that the denomination must embrace the critical elements of historic, orthodox Christianity. Essentially, what that means is the acceptance of the three ecumenical creeds and the documents affirmed as authoratitive for the Christian community in the councils of the fourth century. The three creeds in question are the Apostle's Creed, the Nicene Creed, and the Athanasian Creed. Some object to the Athanasian, but its really just a one doctrine creed, that doctrine being the doctrine of the Trinity. So, you can just take that.
Despite all the wrangling and dissension in the larger Christian community, what I said above applies to just about 99% of all people who take the name of 'Christian' throughout history. It is a vast area of agreement. Yet certain groups that want to be called Christians do not stand on that foundation: the Mormons, the Jehovah Witnesses, the 'Jesus Only' Pentecostals being three big examples.
Clearly, moving beyond the criteria above, there are wide areas of disagreements on plenty of other important matters in the Christian community. These are suggestions that I would offer to help narrow down your options:
A. The denomination will not ask you to suspend critical thinking to embrace some or all of their distinctive teachings.
B. The denomination will appropriately take into account the fall of man.
C. The denomination will gladly stand on normal methods of interpretation of the Scriptures- and other areas of inquiry for that matter. No special, ad hoc methodologies. That is to say, the denomination will respect our need for a sound epistemology.
Now, I could probably go on and add a few, but this sums it up. There are two things i need to say. 1. I do not know of a single denomination which satisfactorily does A-C above on every matter. Its disappointing, but that seems to be the reality. 2. The Christian scriptures maintain that Christ cannot be divided. These divisions are annoying, but personal effort must be exerted not to feel overwhelmed by those divisions.
I can offer a couple of broad strokes that can eliminate some options.
I'm afraid that the Roman Catholic church fails on A amd C. However, they comprehend #2 above.
That moves us quickly to the Protestant section of the field of possibilities.
The Fundamentalists (I'm talking about the REAL Fundamentalists) fail on A and C and in many cases, #2.
Pentecostals, for all their passion, also tend to fail on A and C "The Spirit moves me to tell you to give me $1,000 bucks...." But for all their failings, I admire their fervor. But it is no surprise that the 'Jesus Only' movement arose from their ranks.
The Unitarians. hehehhe ahhhhh the Unitarians. You might actually get lucky and find a Unitarian congregation that will affirm the creeds and the accepted Christian Scriptures. You might find some that definately embrace A, or at least say they do. C... not usually, and B is out the window. Its not nice to tell people they are sinners, so the Unitarians don't, but Jesus said he came to heal the sick, so I guess if none of us are 'sick' as the Unitarians wish to tell us (so as to not hurt our feelings) then Jesus didn't come for any of us.
This leaves quite a few options on the table. I personally haven't been satisfed by any denomination. When you find the perfect denomination, let me know, so I can join.
