Indiana Pacers All-Stars
14 players
14 players were All-Stars in a season with the Indiana Pacers. Jermaine O'Neal did it the most, 6 times (2002–2007). On a roster now: Paul George, Pascal Siakam, Tyrese Haliburton, and Domantas Sabonis.
Selections from Wikipedia's list of NBA All-Stars; a player counts for each club he played for that season. Seasons are on file in full from 1993-94; before that only some of the stars are, so an older name can be missing.