This is all very well as an historical analysis of the philosophers cited but surely with recent developments in understanding the means of our evolutionary path to our current level of self-awareness it is but a point for historians alone and has no bearing on a debate about what are the real drivers of sentience.
This is about more than history and philosophy. It also involves psychology and religion. They all come together as we try to understand G-d.
As far as evolution goes, I think it is fair to say that science is the best way to understand the universe and man's origins. Religion cannot help much there. Religion has tried to explain these things but not been very successful.
But as for sentience, the four disciplines I mentioned above do pretty well.
To believe that an intelligence gifted us with intelligence is fanciful to say the least and there is a rock solid body of evidence to the contrary that clearly shows how intelligence evolved with no intervention.
I do not think you are right here, nor do I believe it is the atheist position. I think it might be the "anti-theist" position, which I think is different.
I think an atheist would say we have no evidence either way whether "intelligence gifted us with intelligence". How could we possible prove this ? We may ultimately never know what gifted us with intelligence, and we certainly do not know now.