And at #14, Lucius Malfoy:

The Forbes Fictional 15
#14 Malfoy, Lucius

Net Worth: $1.6 billion
Source: Inheritance
Age: 51
Marital Status: Married
Hometown: Wiltshire, England
Education: Hogwarts School of Witchcraft and Wizardry

Patriarch of ancient wizarding family still standing after the defeat of Dark Lord Voldemort and his Death Eaters at Hogwarts School of Witchcraft and Wizardry. Malfoy, himself a convicted criminal and Azkaban prison escapee, miraculously managed to avoid being sent back to jail thanks to well-timed "donations" to charities supported by influential Ministry of Magic employees. Now reunited with family and unfettered by criminal charges, Malfoy is aggressively pursuing new business enterprises. In June, attempted to corner the global cauldron market. In August, sold short more than $1 billion worth of Galleons, forcing Gringotts Bank to devalue and withdraw the currency from the Wizardly Exchange Rate Mechanism. Member since 2005.

More on Lucius Malfloy here.

NOTE: Here's #1.