Athiest here...or at least Agnostic, though i think most of the options considered are usually pretty limited (i.e. do you believe in a one God or no?).
What if you believe there WAS a God, but he blew himself/herself/itself up real good in order to make the universe that we have (i.e. the Big Bang was the Big Suicide)? That way, it's, yes, still the fact that God is in all of us (or his/hers/its remains anyway).
What if there are an infinite number of universes, "living" in parallel dimensions (think soap bubbles that stick to each other) and, yeah sure, there is a possibility that some of these were created in a way that there was first an all-powerful being that came about who then set about creating its own tailor-made universe which it ruled forever (or for a loooong time)? Maybe some universes came about on their own and are ruled by whatever cosmic laws (or their own physics) that are prevalent?
Maybe it is true that some things don't need a first cause...that they can come into being out of nothing (as some Quantum theories predict and physics experiments have measured, i believe). If yes, that's good news for everyone, believers and non-believers alike, because that leaves it open that a God can be its own first cause or a universe or particle (or anything) can be its own first cause...somebody doesn't necessarily need to make it.
I never felt at ease with the answer that "God always has been...he's infinite...nobody created him." If God doesn't need a creator, why does a universe? Why can't what IS, also have been that way forever?
Whatever the answer, all non-believers and believers can at least take heart in one common thing: there probably is an answer, and we're all part of it. How meaningful it is in the end is all subjective.