magnate

noun3

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.

   • He mingled with the Magnates of his land; / Join'd the carousals of the great and gay, […] — 1814
3. •
   (historical) 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.

   • Those considered politically dangerous could be excluded from office by declaring them magnates, while cancellation of magnate status was a mark of favour, a means of political patronage. — 2006