>Sunday in the Park with George was one of the few musicals to win...and it didn't go on to win Best Musical... <
Sunday won the Pulitzer about a year after it had lost the Tony for Best Musical. It opened in the 1984 season, lost the 1984 Tony Award for Best Musical but won the 1985 Pulitzer for Drama.
>The Pulitzer is supposed to go to a piece that "preferrably" deals with American Life...which actually sounds like Next to Normal and reasons to be pretty fit the bill. Irena's Vow however doesn't really.<
The stage adaptation of Diary of Anne Frank, Anna in the Tropics and I Am My Own Wife all won the Pulitzer for Drama. The wording, "preferably" dealing with American life, doesn't rule out works with no American character or theme.
Ruined feels like the American play with most heat to me, even if it doesn't deal with a topic of American life.
Begin at the beginning and go on till you come to the end: then stop.