re: the OP, there’s always Ghostbusters (the cartoon show, where Slimer was their sidekick).
Wonder Man, with Danny Kaye’s character getting possessed by the spirit of his dead twin.
Return of the Jedi (old jedi never die; they just fade in and out).
All those various “Saved by an Angel” kinds of tv shows, if you think of angels as ghosts.
Oh, and Angel, when Spike came back in the last season.
The Ghost and Mrs. Muir.
And as far as messing around with the occult like it was no big deal, there’s Cast a Deadly Spell.
Well, let’s see. From the forties:
Here Comes Mr. Jordan (later remade twice as Heaven Can Wait) has a man dying, then taking over the life of someone else. Not quite a ghost, but close.
Angel on my Shoulder involves another person dying and returning to Earth.
The Remarkable Andrew has the ghost of Andrew Jackson returning to help put an end to political corruption in a small town.
The Horn Blows at Midnight has Jack Benny as an angel sent to Earth to blow the last trump and destroy the world. Despite the synopsis, it’s a comedy.
I Married a Witch was the movie on which Bewitched was based on (this also comes from a Thorn Smith nove). The witch is supposedly evil but the tone is light and she falls for the hero.
The Next Voice You Hear has the voice of God appearing on the radio.
Other times:
Disney’s Blackbeard’s Ghost
Bell Book and Candle – another film about a man marrying a witch
Thanks everyone. By the way winterhawk11, was the reason Richie Rich was “the poor little rich boy” because his parents were never around?