(Just contributing this random piece of information in order to avoid having to pick a favourite Schubert song)
Flotte Lotte would have been a good Schubert Lied, with rippling vegetable-mashing piano accompaniment. And perhaps a chorus: Gemuese, Gemuese....
Der Vollmond strahlt von Bergeshöh'n from Rosamunde, one of the very few non-operatic works of Schubert's for voice with orchestra.
Otherwise Der Hirt auf dem Felsen (including that beguiling clarinet-solo as well).
Anything sung by Fritz Wünderlich or Elly Ameling
The programmes I've caught so far have reminded me how superlative the latter was ; I'd never forgotten about FW
"The isle is full of noises... Sounds, and sweet airs, that give delight and hurt not"
The Tempest, Act III scene 2 ll 148-9
But Erlkönig IS my favourite. It's in the Champions' League.