What exactly limits the F-104 from being used as a reference point for your argument. Of course it was designed with a different intent, as a high speed point interceptor, but your position has been that a smaller lighter plane should out maneuver a larger heavier plane.
This is a clear example of contemporary fighters, in which one clearly out maneuvers another, and it's contrary to your position.
The hart of the matter (if you read my earlier post) is that maneuvering (turning) for any aircraft, comes down to two primary factors, Maximum Lift Coefficient and Load Factor, at the stall/buffet point. Weight plays a part in the load factor but it is not the sole determining element (or even the primary component) in determining a aircraft's turning performance. Any of the real aeronautical engineers please step in and correct any mistakes I might have made.