The issue is relevant only if one presupposes that the Christian Church was patterned along the lines of the currently structured Watchtower community of believers, in that there was a secretive, anonymous body of men controlling doctrinal probity. This would then beg the question: What happened to those guys, and how was the Christian Chruch goverened then?
Actually, from the very start, despite all the Watchtower posturings that the Early Church served as a template from which their own organizational bias was crafted, the exact opposit is true. The early congregations were free communities of free people who were united along interdependent lines with the basis of that unity being a common love for the Person of Jesus Christ, not doctrinal propriety. What did those first century believers understand of doctrine?
We know that those first century believers believed in God, but the definition that would stabilize that sense of belief had not yet occurred. The opening chapters of Acts speak of "God" in terms that defy accurate explanation, and this was intersected in some paradoxical crosshairs that involved Christ in this estimation. In the very first days of Jesus' absence, in Acts 1, we see Christians unabashedly praying to Him, and whereas Jewish believers in OT times ascribed all miraculous events to the Yahweh of the OT, the Christians had no hesitation in ascribing miracles in the first century to either "Jesus" Himself personally, or as the inspired text says to the "Lord". It is only when a detirmined effort is made to emend the text to more comfortable contours that propound a "Jehovah" into the NT text that a Watchtower template can be illegally forged.
So the early Christian community were independent churches that had their own internal and self perpetuating structures. Some had elders appointed by a local body, some were appointed personally by travelling evangelists such as Paul, and some evidently like Titus, had single leaders.
When the Church began in 30 AD it was exclusively Jewish, but within 10 years, with the opening to the Gentiles the centre of gravity was beginning to shift. By that time two cities were prominent, Jerusalem which was Jewish in ethnicity, and Antioch, which was urban, prosperous, and Gentile. By 70 AD the shift away from Judaisim was almost complete with, as is evidenced by the many incidents reported in Acts, more persecution coming from the Jews than converts.
In the post 70 AD era, this breach was final and Chritianity broke away from its primal Jewish roots and began to flex its theological sinews along those Hellenized, Gentile lines. This interdependent congregational system continued with local leaders shepherding the flock. Three major centres of Christian theological and cultural influence developed. Antioch, Alexandria, and Rome. Dogma, hesitant, illdefined, and largely undeveloped would evolve along strictly scriptural lines from those three cities and issues would need resolution only with the cooperative effort of all three places.