Let's compile the games which aren't "poor Nintendo getting cloned," but rather "greedy Nintendo ripping off the other guy." I notice that this was much more prevalent back in their early arcade days. For the sake of the list, games with slight differences still count as long as someone else made a game like it significantly earlier. The smaller the difference, the "badder!"
Space Fever - clone of Space Invaders
Alleyway - close of Breakout
Radar Mission - Battleship
Donkey Kong - Carpenter's Union #406