Hmm. How about having someone else die in Hermione's place?

Either Dumbledore is on it and lied to Harry, or it was a student.

I don't recall offhand if the death burst was recognizable as Hermione, but otherwise it seems doable. Dumbledore said he felt a student die and only realized it was Hermione once he saw her.

Harry seemed to think so, but he was obviously biased by seeing Hermione.

You'd need polyjuice for the visual appearance, (...)

Doesn't it wear off after death?

Lesath would seem to fit the bill (...)

Ch92 spoiler: Ur'f nyvir ng qvaare naq ur unf ab gvzr-gheare (Uneel pna'g gnxr bgure crbcyr nybat), fb vg qbrfa'g frrz vg unq unccrarq.

Overall, this plan requires at least 2 hard things to happen correctly: identical fake magic burst and getting real Hermione there and screaming or Patronus shenanigans. I disbelieve this strongly.