Every so often, you come across something awesome but seemingly obvious in retrospect. The Flying Sphere, developed by Japan’s Ministry of Defense, definitely qualifies. It has a single propeller which provides both lift and propulsion. Attitude control and navigation is handled by a series of fins.
It’s more easily understood when seen in action than by reading a description, though…
I wish I’d thought of it — but there’s no reason why I can’t build one!
