Elihu Yale was a Governor of the British East India Company, which made the King rich by peddling drugs to the Chinese, among other thing.

Don't know about the rest.

I thought the preferred pejorative for Leland Stanford was "robber baron".

Or "Captain of Industry" in friendlier contexts.

Duke's name comes from a tobacco businessman: http://en.wikipedia.org/wiki/James_Buchanan_Duke