The leaders appointed by Jesus were called apostles. Their successors in the fullness of the ministry were called episcopoi (bishops). The Apostles themselves would establish the offices of presbuteroi (from which the English term "priest" is derived) and deaconoi (deacons) who would share in only part of the apostolic authority. As for celibacy, this is only a church discipline neither required nor forbidden in Scripture.
“The leaders appointed by Jesus were called apostles. Their successors in the fullness of the ministry were called episcopoi (bishops). The Apostles themselves would establish the offices of presbuteroi (from which the English term “priest” is derived) and deaconoi (deacons) who would share in only part of the apostolic authority. As for celibacy, this is only a church discipline neither required nor forbidden in Scripture.”
I don’t have time to reply on the first part tonight, but on the second, to say it’s a “discipline” doesn’t make it God’s will. “Discipline” can sound good in a religious sort of way, as Paul wrote at one point about self-denial. And as you said, Scripture doesn’t forbid marriage among the leaders. As this is the way that Jesus Himself established the Church, wouldn’t there be good reasons for that? And one other point I’ll briefly mention is that Scripture also says to remove heretics from the Church and not even to greet false teachers as to do so is to approve of their wickedness. So how is it that the Catholic Church allows heretics to stay, including at the highest levels of leadership. A large percentage of these leaders just voted to approve of homosexuality. That’s blatant heresy.