Some of these individuals, like Gates, were well-known. His $40 billion fortune has established him as the richest man in Seattle, if not the world, for more than a decade. But what about the richest man in Spokane, Washington State's second-biggest city? According to Jones, it is Harlan D. Douglass, the largest real estate developer in town, who also sits on the board of Northwest Bank (NBCT) and invests in local companies such as Eagle Hardware & Garden. Bet you didn't know that.