Stephen Wynn has had the largest impact on revitalizing Las Vegas and particularly The Strip. His company, Wynn Resorts Limited, built the Wynn Las Vegas in 2005 and the Encore at Wynn Las Vegas in 2008. He is also responsible for developing the Golden Nugget, The Mirage, Treasure Island and the Bellagio. Apparently it was a good bet because his estimated net worth is $4 billion.