Possible Clues:

• L.A. museum benefactor
• Endower of an L.A. art museum
• ___ Center (L.A. art venue)
• California museum that’s the current home of 73-Across
• American business family with companies selling oil and stock photographs
• 'All the Money in the World' figure
• Magnate who wrote 'How to Be Rich'
• Oilman who learned to speak Arabic
• California's ___ Museum
• Big name in museums