Poker Listings published an interesting study contrasting popular and industry-contributing former World Series of Poker former champs like Raymer, Moneymaker and Hachem with less visible or plain unpopular poker personalities that have won the honour.
Check out http://www.pokerlistings.com/top-5-least-popular-wsop-main-event-winners-40112 to see what Jerry Yang, Amarillo Slim, Robert Varkonyi, Jamie Gold and Russ Hamilton have in common.