Michael Jordan is about as active as they come
This list is players and head coaches only: Billy Cunningham (76ers 1967) Charlie Scott (Celtics 1976) Mitch Kupchak (Bullets 1976, Lakers 1982, 1985) Tommy LaGarde (Supersonics 1979) Bob McAdoo (Lakers 1982, 1985) Bobby Jones (76ers 1983) James Worthy (Lakers 1985, 1987, 1988) Michael Jordan (Bulls 1991, 1992, 1993, 1996, 1997, 1998) Scott Williams (Bulls 1991, 1992, 1993) Kenny Smith (Rockets 1994, 1995) Pete Chilcutt (Rockets 1995) Rick Fox (Lakers 2000, 2001, 2002) Rasheed Wallace (Pistons 2004) Coaches: Billy Cunningham (76ers 1983) Larry Brown (Pistons 2004) Note: There are comments associated with this question. See the related question to add to the conversation.
The smart ones. UNC may have the best basketball team on the planet...but the football team isn't much to cheer about. Seriously though...there is an infinite number of FUTURE NFL players who will go to schools other than UNC. Unless someone has a crystal ball to predict the future...that may be the best answer you'll get.