I would suggest reading E.H. Broadbent's "The Pilgrim Church."
Don't get hung up on needing a "headquarters" or looking for a "denomination". The church from its earliest days was made up of local, autonomous gatherings of Christians.
Today we "have church" on Sunday, but this is a man-made tradition. The true biblical church is a Body of living parts, all equal, all priests. It can exist in a prison cell in Nepal or in a small community in the Alps or in a megaplex in LA. It is not bound by structure, ritual or sacrament.
The church is a building founded on Christ and made up of lively stones. God does not dwell in tabernacles made by men (Hebrews). If you understand this basic concept, then it is easy to see that "the church" could easily "survive" against any organization or heresy.
In fact, most of the epistles were written to correct rank heresy. The true church fought false gospels, false Jesuses, false teachers and false doctrines from its very inception. Among these heresies is the heresy of "classes" of Christians; those who, in the name of Christ, Lord over God's people.
Satan presents himself as an "Angel of Light" and his ministers are "the ministers of righteousness." False teachers will rise up "from amongst yourselves" Paul warned.
Know what "the church" truly is; realize it will always be small; realize that it is meant to be persecuted; realize that it is not of this world and seeks no earthly kingdom or power. If you grasp the truth of "the church," many "problems" of history, organizations, and man-made authorities will disappear.
The gospel was delivered once for all in the first century, never to be changed (Gal 1:8-9, Jude 3). Since then, many organizations have tried to beguile people away from "the simplicity which is in Christ" (2 Cor 11) and enslave people to a "system". We know what we have received and we do not require a group to gather to vote on "truth". "Thy Word is truth."
