Who has won in F1, Indy and Stock Nascar?

Unless you have been off the grid for a few weeks, you probably heard that Juan Pablo Montoya won the Indy 500 for a second time. Before that second Indy win, it had not dawned on me the Montoya has won in F1, Indy and Nascar cars.
-Who else has accomplished that? Only Mario Andretti and Dan Gurney. (Correct me if I am wrong).
-Who came close? Only a hand full have even competed in all three series, like AJ Foyt.
-I look forward to seeing what Montoya accomplishes next.
http://en.wikipedia.org/wiki/Juan_Pablo_Montoya

Gurney is correct. AJ Foyt never got that F1 win. I think Dan Gurney is also the last F1 racer to win in a car that he built himself.
-Nigel Mansell certainly had the ability to do it, if he wanted to. I think he was too busy entertaining the ladies. It's difficult to pack on enough weight to prevent you from fitting in a stock car. There have been some 300lb Nascar drivers.
-There have been many racers that have won in two major race series. Quite a few Nascar, Indy and F1 racers have won in Le Mans style endurance racing. Jeff Ward won in Indy cars and AMA Motocross. In the 50s and 60s, some F1 racers won world sports car championships.
-There are a lot of versatile race drivers out there now that can win in any motorized series, but Montoya still tops my list.