I've always found the top-down angle of the piano keyboard to be a very clean look. It shows exactly where the fingers are landing, and provides a good perspective of how the hand is moving across the keys.
I recently put out a recording of a piano cover on "A Mother's Prayer" by the Gettys using this angle. Some people asked how I achieved this view of my keyboard, so I'm writing this to share the setup that I used. Links will be provided for all of my gear, should you want to try this out for your own recordings!