Korver played in the 2015 all-star game when he was with Atlanta. He had 21 points off the bench too.I guess the top tier of Iowans who played in the NBA would be (in no particular order) - Korver, Lafrentz, Barnes, and Hinrich. No All Star appearances or All-NBA teams for any of them but Barnes has a ring, so if that's the tiebreaker then Barnes has had the best career. At his current pace he'll pretty easily have the best career numbers of any of them.
https://www.basketball-reference.com/allstar/NBA_2015.html