The scripture is very clear. God is more than one person. God's oneness is not the one of unitarian monotheism, it is the one of unity and exclusivity only:
the Word was with God, and the Word was God (John 1:1)
But of the Son he says, “Your throne, O God...therefore God, your God... (Heb 1:8-9)
No one has seen God at any time; the only begotten God who is in the bosom of the Father, He has explained Him. (John 1:18)
who, although He existed in the form of God, did not regard equality with God a thing to be grasped (Phil 2:6)
Clearly, two distinct persons are being called God, both Jesus Christ and the Father. This is why Jesus says:
I and the Father are one. (John 10:30)
For anyone to try to explain this away is nothing but a dishonest attempt to uphold a false theology of God's oneness despite the Biblical data to the contrary.
God is not a lonely solitary person. He is a community of being, three persons who are so fully interpenetrated that they share one "Name" and are one God:
Go therefore and make disciples of all the nations, baptizing them in the name of the Father and the Son and the Holy Spirit (Matt 28:19)
This is also His model for His children:
...that they may be one even as We are one John 17:11
"We" are one
"They" are one
This is uniplurality. God is a Uniplurality.
