Thesaurus:wealthy person

• affluent
• capitalist
• fat cat (slang)
• HNWI
• moneybags    [⇒ thesaurus]
• rich person

• Croesus
• Midas
• Rockefeller
• Rothschild

• beggar    [⇒ thesaurus]
• palliard
• pauper    [⇒ thesaurus]

General

• rich man
• rich guy
• rich dude

General sub-types of rich person

• champagne socialist
• chardonnay socialist
• debutard (vulgar, slang)
• fat cat (slang)
• gauche caviar
• jet-setter (idiomatic)
• job creator
• latte liberal
• limousine liberal
• oligarch
• patron
• playboy
• playgirl
• rich kid (US, somewhat derogatory)
• silvertail (Australian, slang)

By amount of wealth (real numbers), in order of size

• hundredaire (usually humorous)
• thousandaire (usually humorous)
• millionaire
• megamillionaire
• multimillionaire
• billionaire
• centibillionaire
• multibillionaire
• mega-billionaire
• trillionaire
• quadrillionaire
• centillionaire

By amount of wealth (unspecific numbers)

• bajillionaire (humorous)
• bazillionaire (humorous)
• gazillionaire (humorous)
• katrillionaire (humorous)
• kazillionaire (humorous)
• squillionaire (humorous)
• zillionaire (humorous)

By age of wealth

• new money
• old money
• nouveau riche

• person    [⇒ thesaurus]

• tycoon
• captain of industry
• magnate
• mogul
• nabob
• financier
• plutocrat
• parvenu
• upstart