Darwin gets a bum rap from the pious crowd. His book was on the Origin of Species, not the origins of life. He only sought to offer a theory on the variation and adaptation he observed. The last paragraph of "The Origin of Species" states the following:
"There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone circling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved."
Did you read the whole article? Maybe Darwin mentioned a Creator (I have no idea, I didn’t write the article and am far, far from being an evolution scholar!!!) but generally the current proponents of evolution are certainly atheists.