Listverse has a great compilation of top bizarre exhumations of famous people that is quite an interesting read.
My personal favorite is the story about Virginia Poe’s burial. She spent some time under a Poe biographer’s bed for several years before being reunited with her husband. Edgar Allan Poe’s remains also suffered from a not-so-peaceful interment, starting with a grave marker simply engraved “No. 80” and ending up with a monument honoring him elsewhere. Wikipedia has more details.