Beethoven's Opus 18 No. 4 is one of his earlier works, written between 1798 and 1800. It consists of 3 brooding and stormy C-minor movements, with the second movement providing some light relief in the relative major key.
Schubert's iconic 'Death and the Maiden' Quartet (no 14) is acknowledged to be one of the pillars of chamber music repertoire. Written in 1824 in response to the composer realising he was seriously ill and without long to live.