First of all so there is no misunderstanding Jesus was always way above the rest of the spirit children including Lucifer who was among us in the pre-mortal the scriptures testify to it in Isa 14 was mention in my first post.
Yes in that realm we were sisters and brothers in the spirit, and Heavenly Father was the Father to all of us even though none of us were begotten, like the Son Jesus Christ!
BTW when we die does it not say we will return to the Father from whence we came!
So that reminds us that we have existed before this earth existence.
The version of the 3 or Trinity as you believe they are all 3 one in one substance.
LDS version of the Godhead is that the 3 or separate not in one substance.
Your Trinity remains as 3 spirits in one substance. So we do come to different conclusion in that area.
The LDS believe that Jesus NOW has a resurrected body, which means that he has received the fullness of the Heavenly Fathers Glory of an eternal Body of Flesh and Bone.
I would also like to say that in searching the Scriptures one begans to have an greater insight or observation on such things (as in the sister and brother relationship of the premortal spirits) which understanding is received by the power of the Holy Ghost, but to make clear they are not the doctrine, it is more awareness of how things work or putting our understanding into perspective, but it is not doctrine in the sense of vital ordinance or covenants!
I believe that none is saved without Jesus Christ, for he showed us the way and redeemed our souls.
In all due respect.