Feel free also to click my Amazon store over there and find some of his sublime recordings of German lieder, among other things.
Take a look at the great DFD singing Mr. Schubert's Erlkönig:
Here is a 1955 recording of DFD singing Mr. Schumann's Mondnacht:
A haunting Der Leiermann, last of Mr. Schubert's amazing Winterreise:
There are dozens--nay, hundreds--of videos of Herr Fischer-Dieskau's amazing performances of lieder, concert works, and opera. I encourage you to look for more!