Unity among Catholics, Eastern Orthodox, Oriental Orthodox, Anglo-Catholics and certain groups of Lutherans may have enough in common to possibly unite with the Holy Spirit’s aid, but I don’t know if unity with those who who reject apostolic succession is possible.
Why not accept the unity under the Headship of Christ? Does every church have to be under one organization?
“I don’t know if unity with those who who reject apostolic succession is possible.”
As one whose only Holy Father is in Heaven, I agree with you.
You inexplicably left out the Non-Ephesenes (the Holy Apostolic Catholic Assyrian Church of the East, the Ancient Church of the East, and the Caldaean Syrian Church of India). They also have apostolic succession. Of course, they're Nestorians, but since you accept the Monophysites, you certainly can't object to Nestorianism either. This was surely an oversight on your part.