Magnate

Noun

1. Powerful industrialist; captain of industry.

   "I have decided to become an oil magnate, after spending quite some time reading the dictionary definition of the word magnate."

2. A person of rank, influence or distinction in any sphere.
3. In medieval and early modern Italy, a member of a legally defined category of especially wealthy patrician families, often deprived of the right to political participation by republican governments.