I doubt anyone will use this idea but i personally enjoy reading Classroom of the Elite fanfics so this is one of the ideas i came up with.
MC will get reborn as Kakashi Hatake in Classroom of the Elite.
But obviously no chakra, sharingan and jutsu because that would just ruin the story since classroom of the elite is more of a slice of life story.
You want to keep his appearance and personality the same as in Naruto...
So i want to see his excuses when late, porn reading and shit like that. You could keep his taijutsu skills and just adjust them since he cant use them along with chakra anymore.