Nabob

Wealthy, powerful or influential individual, usually of exaggerated self-importance

Examples:

In the United States today, we have more than our share of nattering nabobs of negativism. They have formed their own 4-H club — the hopeless, hysterical hypochondriacs of history.
— William Safire, written for a Spiro Agnew speech (1970)

We must kill them. We must incinerate them. Pig after pig. Cow after cow. Village after village. Army after army. And they call me an assassin. What do you call it when the assassins accuse the assassin? They lie. They lie, and we have to be merciful, for those who lie. Those nabobs. I hate them. I do hate them.
— Colonel Walter E. Kurtz, Apocalypse Now (1979)

How can republican institutions, free schools, free churches, free social intercourse exist in a mingled community of nabobs and serfs; of the owners of twenty thousand acre manors with lordly palaces, and the occupants of narrow huts inhabited by “low white trash?”
— Rep. Thaddeus Stevens, to a meeting of the Pennsylvania delegation in Congress (1865)

Etymology:

• Used in India and Pakistan, originally for governors imposed by the Mongol empire, this is related to the Arabic honorific, na’ib