As you have included Eline af Villenskov in your list, I guess you are open to Scandinavian ballad suggestions ...

These are a couple of the most famous ones.

Herr Olof och Älvorna (Swedish, Sir Olof and the Elves) aka Elveskud (Danish, Elf-shot). Man meets dancing elves on the day before his wedding, they ask him to dance, he refuses, they curse him, he dies, everyone else dies.

Älvefärd (Swedish) or Elvehøj (Danish, the elf mound). Man goes to sleep near an elf hill, elves wake him and ask him to dance, an elf sings a beautiful song, elves offer him some things, god saves the man by sending the dawn, with a cockerel flexing its wings ... or something like that. rather a lot of variation with this one.