Everybody has to make his own bike what he wants it to be. I can understand you wanting a higher stem and more upright position, though you might then want a wider saddle better suited to that position.

But I took another look at the photo, and can't imagine that you'd want the bars back any more than they are.

In any case, looking at the photo, you seem to have about 1" upside room on that stem, and correctly rotating the bars so you can use the hand grip position without breaking your wrists would be a place to start. since the bars have rise, using the normal hand position rather than gripping at the center would move your hands both back and up.

I suspect that you went with a longer stem because the bars were too far back before, so going back there hardly makes sense.

However, as I said, it's your bike, and only you can say what position you prefer.