http://www.miamiherald.com/2012/08/13/2949900/greg-kouri-paypal-co-founder-dies.htmlThis guy has a really interesting story. Obviously did very well for himself, but managed to remain well respected and went on to invest in SpaceX and Tesla Motors due to his connection to Elon Musk.
According to the article he went to emergency saying he'd swallowed a fish bone and died from a heart attack while admitted.