I wouldn't pleat to no stripe. Like has been mentioned in other posts, it creates lawnchair butt. I also, think it's kinda weird because you're essentially removing the vertical component of the tartan, which to me kind of defeats the purpose of wearing tartan.

You could try to find some pictures of the Black Watch regiment to see which stripe their kilts are pleated. Same tartan, just different hues. If you have photo-editting software you could even lighten the tartan.