Strange thing about Charles Laughton - his ghost is said to haunt the stage where the Oregon Shakespearean Festival is held in Ashland, Oregon. He was planning to appear in a play there at the time of his death. He has been seen by a number of people in the years since 1962.
You are wrong about Elsa's ashes being scattered at sea. Years later it was discovered that the urn with her ashes was buried at Valhalla Memorial Park.