Founder of Metromedia (TV and radio empire)
Passed away: Sept. 7, 2010
Wealth-X (Est.): $7.5 billion
Potential tax uncollected: $3.4 billion
NEXT: Mary Janet Cargill
Last updated December 22 2010: 5:34 AM ET
*Net worth figures from Wealth-X. **Assuming tax liability hasn't been reduced by trusts and charitable deductions. N.A.: not available