What about a series of programs contrasting different composers' settings of the same texts. Many composers have set poems by Goethe - and not always in the original German. Imagine contrasting Schubert's "Gretchen am Spinnrade" with Berlioz's setting of the same text in "La Damnation de Faust".
Schubert's setting of Shakespeare's "Who is Sylvia" is probably the best known, but there are several others.
There are also the innumerable settings and arrangements of folk songs by different composers - I would nominate Benjamin Britten's "Down by the Salley Gardens" as an iconic example.