I'd set the haze density to something like 4 and increase the amount of glow to make it just not overcast (as you can see in the reference the sky is glowing, but still blue sky is visible).
Then enable soft shadows, use something like 1 for radius and at around 15 samples at least.
The sun's elevation is not very high in the reference, otherwise there wouldn't be so much shadowing, so keep sun elevation at default 25 or 30 at most.
That's at least how the reference 'feels' to me.