I think one of your problems is that she doesn't look like a zebra, she looks like a cow. Zebras don't have short, peach toned noses, they have longer snouts with dark grey noses. Also the tone of grey around the eyes is too light, making the white of the eyes dissapear. I personally think Grundislav's edit is perfect for making her look like a zebra without losing the style, but since you don't like it, just darken all the tones a little and make her nose a dark grey. Adding a few black dots on alternate pixels along the sides of her face might give the illusion of stripes.