I am not making an argument for the veracity of any particular religious tradition. I'm arguing for a particular concept of God.
Yes: you're arguing for
your concept of God, and I would bet good money that there's more to your concept of God than just "uncaused cause."
To borrow a phrase often repeated by atheists. That which is asserted without evidence can be dismissed without evidence.
And while it is well within your prerogative to ignore it, the Christian tradition (especially in its Catholic and Orthodox forms) is far deeper and far more rich than you give it credit for.
"Without evidence?" I assumed that you would be familiar with the Nicene Creed. If you aren't, maybe you should check it out.
It describes how God the Son is a literal man with powers beyond that of a normal man, who now lives in Heaven. I think "cosmic superman" is a fair summary of this idea.
I think "cosmic superman" also works for God the Father, a being who the Creed tells us begot (not made, begot - the Creed is emphatic about this) a son and has a form that's physical enough to have a "right hand" and to reside in a specific place.
OTOH, your god that's "timeless, transcendent and completely devoid of all parts and material components" doesn't fit anything described in the Creed, which says that even the Holy Spirit talks to people occasionally.