The way I see it all these men being spoken of were in the same Church, including also the prophets being spoke of in Eph 2:19-20 built upon the foundation of the Deliverer and His promise. The Gospel.
Baptism is a show of faith and lead by the Spirit to bring us to believe in the promise (Gospel of God) of the Deliverer. In the OT the Spirit of faith put them on the right side of the gulf waiting for the Deliverer (because they were in the Church), while Jesus was with them it was a show of faith in the Deliverer that He was here with them now (because they were in the Church), for us it is a show of faith that the Deliverer has now set us free (because we are in the Church).
Seems to me Baptism is a show of faith in the Deliverer and a sign that the Spirit is in those of the Church, whether the Deliverer is coming, here, or left and coming back.
I think the following verses hold true that if any are in the faith (Baptism) however it happens, of the Spirit at any time, that through the Deliverer (Son of God) we are saved “together” being in the Church. (those having the Spirit of faith in the Deliverer)
(Joh 15:1) I am the true vine, and my Father is the husbandman.
(Joh 15:2) Every branch in me that beareth not fruit he taketh away: and every branch that beareth fruit, he purgeth it, that it may bring forth more fruit.
(Joh 15:3) Now ye are clean through the word which I have spoken unto you.
(Joh 15:4) Abide in me, and I in you. As the branch cannot bear fruit of itself, except it abide in the vine; no more can ye, except ye abide in me.
(Joh 15:5) I am the vine, ye are the branches: He that abideth in me, and I in him, the same bringeth forth much fruit: for without me ye can do nothing.
I am the true vine (only way-Deliverer)…Every branch in me (having the Spirit of faith in the Deliverer)…explained, my “Father” is the husbandman…Abide in me (Son, live through the deliverer), and I (through Spirit of faith) in you.
Just seems simple that Everything works together here through God-Trinities Gospel for the One Church (those of faith)
Now we are clean through the Word of God (glory to that, by having faith in the Word (God’s Gospel promise) now sinless, through the Word (also Deliverer) through the Spirit in Him and now delivered)
The promise of the Father to the Son, the promise from the Son to us, the HS giving us faith in the promise “all” in one Church through faith and the promise.