Go with the first one. It is absoulutely gorgeous, and the overall effect is stunning. I love the chiaroscuro-styled painting vibe that I get from it, but that is just my humble opinion.

The third and fourth ones are gorgeous in their own ways, but I prefer muted colors to brighter ones, and Yuuko's face in those versions are a littletoo pale for my liking. Just asking, but maybe if you remove the exclusion layer ( if there is one) or lower the opacity of it, maybe it'll look better xD