This took a while, but I found it!!!
Wolf Kahler, German actor, made an appearance in Wonder Woman. However, he didn’t go down with his ship and die in World War I. Indiana Jones (or, the Ark, to be more precise), took him down in Raiders of the Lost Ark. Brent Crimm, I thought you in particular would appreciate this bit of sleuthing I was able to successfully perform just now. 🙂
So, Indiana Jones and the Justice League now have a crossover possibility! WOO!