Hey Dave…
I was just using India as an example, but sure, maybe that would be a good place to start. Try googling the “Syro-Malabar Church” or “Malankara Orthodox” and see what you come up with. Maybe there is a decent Wikipedia article on it. I will warn you though that the modern history of Indian Christians is very complex, but the early tradition of all of them is pretty straightforward.
Both the “Syro-Malabar Church” or “Malankara Orthodox” can legitimately trace their origins all the way back to the apostle Thomas.
The Syro-Malabar Church is an Oriental (Eastern Rite) Catholic Church, now, in full communion with the Church of Rome.
The Oriental Churches, which only recognize three ecumenical councils: the First Council of Nicaea, the First Council of Constantinople and the First Council of Ephesus.
List of Oriental Orthodox churches:
The Armenian Apostolic Church
The Holy See of Cilicia
The Armenian Patriarchate of Constantinople
The Armenian Patriarchate of Jerusalem
The Coptic Orthodox Church of Alexandria
The British Orthodox Church in the United Kingdom
The French Coptic Orthodox Church in France
The Ethiopian Orthodox Tewahedo Church
The Eritrean Orthodox Tewahedo Church
The Syriac Orthodox Church of Antioch (also known as the Syrian Orthodox Church of Antioch)
The Malankara Jacobite Syriac Orthodox Church
The Indian (Malankara) - Orthodox Syrian Church
I understand that Christianity flourished primarily in five centers of the Roman world for the first five centuries: Jerusalem, Antioch, Rome, Alexandria, and Byzantium, which became known as Patriarchates. I am aware of all of the autocephalous and autonomous Orthodox churches out there in the world today; I am also aware of the Eastern Catholic Churches that are autonomous, self-governing particular churches in full communion with the Bishop of Rome. Almost all of the separated Orthodox Churches of the East, unionized with Rome, forming the 22 Eastern Catholic Churches, we see today. The remaining Eastern Churches joined the Greek or Byzantine Orthodox Church of Constantinople.
Of the 22 rites in the Catholic Church today, 21 of those rites comprise the Eastern Catholic Churches, and one rite comprise the Western Catholic Church, and each have a distinctive rite or tradition, namely in liturgy, in ecclesiastical discipline, and in spiritual tradition, all in union with the Bishop of Rome.
Firstly, have I missed any? Secondly, I find it interesting as to why these 21 Eastern Orthodox Catholic Churches of the East, unionized with the bishop of Rome, in the first place? And thirdly, can you show me where each of these Eastern Orthodox or Oriental Catholic Churches, at anytime, from the 4th century to the great East - West schism, held local synods to determine their respective canon of scripture, just as the Roman Catholic Church did, at their various local synods? After all, we are looking for a universal consensus amidst all of the preceding churches, as opposed to an ecumenical consensus which, historically, does not exist.
I don’t know if we can really call it a consensus if we don’t officially know which books these Eastern and Oriental Catholic Churches embraced and jettisoned; you know what I mean?
One more thing: what if, hypothetically speaking, one, or several of these Eastern Orthodox or Oriental Catholic Churches had recognized certain New Testament books that are not unanimously recognized today, as being canonical, or rejected certain books that now comprise our New Testament today; what would that have done to the universal consensus among all worldwide churches, idea?