Eyebrow styles are a fad and I would not go after some specific shape to "fit" your face. For example, in the chart anon posted just above, the high arch examples already look stodgy and out of fashion to me.
Keeping them neat like you do is the most important thing, but after that is keeping them (reasonably) even. For you, OP, I would pluck above the brows where they are higher towards the outside of your face, and try to get the top line smoother. I think that alone would make your face a lot softer.