Middle or right, leaning more to the right.
Because right looks awesome and it has got some blocky style so it is somewhat unique. Also, middle maybe requires much more time and effort to create. So if they are both appealing and very similar, then I would choose the one that needs investing less resources.
Left is way too much in line with the simplicity of the gameplay characters so I vote no for left. It would be refreshing and revealing if we could see a more detailed portrait such as middle or right.