https://en.wikipedia.org/wiki/I_Have_No_Mouth%2C_and_I_Must_Scream
>AM (Allied Mastercomputer, Adaptive Manipulator, Aggressive Menace), a hateful supercomputer which brought about the near-extinction of humanity after achieving self-awareness. It seeks revenge on humanity for its own creation
Notably, he is immobile and planet bound. He killed all of humanity with their own nukes and keeps a few to torture. I think there's better opponents than a motile AI that probably outstats him.