It is strangely appropriate for their deaths to more or less coincide, because McGoohan and Montalban were both well-known for the larger than life characters they played. Patrick McGoohan became a cult celebrity for his role as Number Six in the classic television series The Prisoner (not to mention his major role in developing the series as a whole), while Montalban achieved fame/infamy for his role as Captain Kirk’s nemesis, Khan Noonien Singh, in both the original Star Trek episode Space Seed as well as the film Star Trek II: The Wrath of Khan.
It is worth mentioning that both actors had extensive careers which went beyond the iconic roles mentioned above (McGoohan would have been particularly irked to be seen solely as Number Six). A few roles that struck me: McGoohan played another secret agent in the British spy series Danger Man, and had major roles in Ice Station Zebra, Escape From Alcatraz, Braveheart, and Silver Streak. Montalban was the star of the unusual television series Fantasy Island, and did a wonderful job as the villain in the comedy The Naked Gun.
If the passing of any actor makes me think a bit more about my own mortality, it is the passing of these two. Both played larger than life characters who, it seemed, would go on forever. It’s hard to imagine that Number Six and Mister Roarke aren’t immortal!