Are Napoleon, Caesar and Alexander great European hegemons?

Napoleon is the overlord of Europe, because he never completely broke the balance of power, the maritime power Britain and the northern country Sweden.

Alexander the Great was not.

The expansion of the Macedonian legion was mainly the eastward expedition.

Covering ancient Greece, Asia Minor, Babylon, Egypt, Persia and the Indus Valley.

Therefore, the sphere of influence of the Alexander Empire in Europe is very small, let alone the overlord.

The Roman Empire after Octavian can be regarded as the overlord of Europe.

(The sphere of influence has covered southern England and both sides of the Mediterranean)