Here's my take.
There is one of two options, either the beginning of everything was supernatural, or it wasn't. If it was natural, there is a plethora of options, both current theories and theories we don't even no about yet that could fit in nicely. Likewise, if it was supernatural, there is a also a plethora of options it could be, any accepted God being one, or some other option we don't know about.
I think it is a disservice to this debate to say it was either God or it wasn't. It is like saying if not A, then B. Oh really? Why? What about C, D, E, and F we may not know about?
In the abcense of other mitigating factors, I side on the natural side. This is for 3 reasons.
1. The history of the supernatural (religious) side is embarassing. It is littered with instances of outright false claims that had no way to be verified at the time they were made and were later shown to be conclusively wrong. This is different from the natural (scientific) side because, unlike the supernatural side, they were never claimed to be absolute truth. Only best guesses based on the evidence available at the time drove the thought process. There are still young earth creationist and intelligent design people out there that flat refuse to look at the evidence which is all but common sense in the 21st century.
2. If the debate starts out "how is something created from nothing", then until the origin of the starting point is defined the supernatural side has no legs to stand on. Simply defining a being as "supernatural" and eternal, outside of time, etc is just as arbitrary as saying the universe (or any other starting point) is supernatural. We can see the universe, yes, but we certainly don't understand it. One could easily argue it is just as supernatural.
3. The foundational rules of the debate are flawed from the beginning, suggesting a supernatural force or being has to be a logical option. Why? Who says there is a beginning or end? Who says we fully understand every property of matter, or time? How do we know time as we know it exists? How do we know matter isn't being created from "nothing" as we speak and is actually a common occurance in our reality? For that matter, how do we even know we even physically exist?
...In summary, too many unknowns and there are issues with both sides at the moment. To presume we even have all information at the moment for the debate to even be relevant is erroneous. There could be some new piece of evidence out there still that would refute the supernatural or natural side from even being in the conversation.
But like I said, on balance, if I had to choose I'm going with the natural side until further notice. And I see zero reason to believe it is any one of the accepted Gods in society at this particular point in history.