wealthy person; person of wealth
A straightforward noun for someone who possesses substantial assets or property. Neutral in register.
He is a well-known wealthy person in this town.
富豪 refers to a very wealthy person, often with a connotation of great fortune or a magnate, and is more emphatic than 財産家.
Compound of 財産 (property, assets) + 家 (person, specialist). The derivation is transparent from its components.