The Principle of Contingent Causation: The Impossibility of Infinite Regress.

[Belacqua]

Obviously, when we total up all the stuff that's out there -- all the stuff that makes up the universe -- nearly all of it is clearly contingent….

We know almost nothing about "all the stuff that's out there". 
Dark Energy and Dark Matter comprise 95 % of this universe. 
We know nothing about what it is or how it acts. 
We know about 5 % of what comprises this universe. 
We know very little about reality between the quantum world and the macro world. 

If there are other universes we know nothing about them, or about the environment within which universes launch. 
Roger Penrose's Infinite Cycles proposes no cause is necessary at all. 
 
https://www.youtube.com/watch?v=K_FUlo8BF9Y

Penrose does make an effective argument against a temporal First Cause. That's why I have never argued for a temporal First Cause. 

As far as I can tell, nothing Penrose says speaks at all against an essential First Cause. Or something like the Neoplatonic One, or the Brahman, or the Buddhist Not-Two. 

Nor does the fact that we don't understand Dark Matter, or multiple universes, etc. militate against an essential First Cause. 

Penrose seems to be popular here when we're talking about infinite regress. But when he says he believes that numbers have an existence that is independent of the minds which think of numbers, people point to his authority somewhat less.