In the 1996 movie adaptation of Matilda, Danny Devito narrates, but also plays one of the main roles as Mr Wormwood; as a result, we hear the distinctive voice of the actor narrating things that the character played by the actor does not know, and the narration continues past the point where the character has permanently departed the movie.
But in that case, it could be argued that there is simply no in-movie connection between the voice of the narrator and the voice/performance of Mr Wormwood; they sound the same, but are not the same character, so how about…
In Guillermo del Toro’s 2022 adaptation of Pinocchio, Ewan McGregor narrates, as the character of Sebastian J. Cricket, for whom there is an in-movie explanation of his role as narrator - he is a budding writer; at the beginning, intending to publish his own life story, but ending up writing the story of Pinocchio and Gepetto. Sebastian J. Cricket dies near the end of the movie - yet, as narrator, even describes, in the first person, that this has happened - and continues speaking about events that took place after his own demise.
I imagine one way to be super-creepy would be to have the narrator character narrate their own death, then not have any narration from that point forward.
Kevin Spacey played the narrator of his character’s life in ‘American Beauty’. A twist at the end was that he had been killed toward the end of the story, so (if I remember) had been dead the whole time he was telling the story.
I was thinking of the OP more like in I, Tonya where, in the movie, Tonya shoots at Jeff with a shotgun, and then Tonya as the narrator immediately says “This is bullshit. I never did this!”
As for dead song singers, on the serious side how about Neil Young;s Powderfinger, and on the funny side Dewey Cox (from the film Walk Hard) singing “(Have You Heard The News) Dewey Cox Died”. And he did, at the end of the song.
I don’t mind dead song singers, for some reason. I guess the disembodied spirit should get the final say.
Nicolas Cage’s character, H.I. McDunnough, narrates Raising Arizona, but the narration is far more articulate and flowery than H.I. presents in the events shown in the movie.
Usual Suspects is narrated by Kevin Spacey aka Verbal Kint aka Keyser Soze, hence almost everything that occurs in the film could in fact be fabricated by him and never actually happened (not that the narration is the only reason to think that, but it emphasizes it IMO)
Just encountered another one… In the Netflix production of A Series of Unfortunate Events, the title song has different verses for each episode(complete with mild spoilers about the episode), performed by Neil Patrick Harris, who also plays the arch villain in the show.
Call the Midwife has narration by an elderly version of Jenny Lee, who leaves the show after series 3. The show is on series 13 and “Mature Jenny” still does the narration. It’s mostly just “birth is always a new beginning, full of promise and innocence and life and love and blah blah blah blah” sort of stuff and not plot-heavy specifics, although I want to say there is sometimes some “Nonnatus House had never before faced a challenge so challenging” or “that summer would hold many surprises” kind of stuff.
This is double narrative trickiness from Scorsese as he convinces you from the start the De Niro’s character is killed at the end and doing a posthumous narration (by starting with De Niro being blown up in a carbomb), whereas you find out at the end he survives.