Who else could have played Col. Stuart?
While William Sadler did an adequate job and Die Hard 2 is an excellent movie overall(though not as good as the first film of course) I've often felt that someone else could have been a better fit. Sadler looked a little too young and somehow not quite cold or intimidating enough. I can think of a few off the top of my head who not only would have looked the part more so than Sadler but probably would have given better portrayals of Stuart. By contrast, NO ONE could have played Hans Gruber in the first film but Alan Rickman.
Anyway, my picks would be:
Robert De Niro
John Lithgow and James Cromwell would have also been good picks.