Unlike most actors, he got lucky in his old age achieving greatness in comedy after years of mediocrity in mediocre drama. He’ll be remembered for the comedy, you can be sure.
Forbiden Planet was not mediocre. It is one of the greatest pioneering sci-fi movies of the 50s. I am watching it tonight in memorium. I watch the Naked Gun and Airplane! movies all the time, but I haven't seen that one in decades.
Since I am posting, one of my favorite lines... "Nurse, get this man some drugs, quick! Can't you see he's in pain?"