Great Spirit you say?
Tell me more. Sounds like you might be into something Big - really Big.
Yeah, the human imagination is big... relative to other animals. Puny relative to nature.
Elephant...blind men...trunk/tusk/tail...etc etc.
This ground's been covered. You're repeating an error that's been corrected before.
The key word is
blind. You're leaving out that the blind men are entirely wrong. None ever figures out it's a trunk or a tusk or tail. Because their belief-making habit stops them. They form quick easy opinions rather than staying open-minded. They never put their heads together and work out a methodology that overcomes their problem of believing.
You're suggesting different religions point, each within their limits, to a God. What if the evidence were put together and tested to find what the hose and rope and tree and wall really are? Maybe they all resolve into "something Big"?
That's been done! The evidence is in, so there's no mystery to what the "elephant" is behind "the masks of God" that the blind cultures were feeling. They all tried to explain nature with the same anthropomorphic impulse, wanting some great being that directs how things go in nature. The elephant, the "really Big" being behind the masks, is that shared impulse among humans.
It's not a mystery.