Well, here is a listing I found on ThinkQuest for the "15 Greatest Chamber Works", listed in chronological order:
1 - Wolfgang Mozart String Quartet in C, K465 "Dissonant"
2 - Joseph Haydn String Quartet in C, Op.76 no.3 "Kaiser"
3 - Ludwig van Beethoven String Quartet in F, Op.59 no.1
4 - Franz Schubert Piano Quintet in A, D667 "Trout"
5 - Franz Schubert String Quartet in a, D804 "Rosamunde"
6 - Ludwig van Beethoven String Quartet in B flat, Op.130
7 - Felix Mendelssohn Piano Trio in d, Op.49
8 - Robert Schumann Piano Quintet in E flat, Op.44
9 - Johannes Brahms Piano Quintet in f, Op.34
10 - Johannes Brahms String Quartet in c, Op.51 no.1
11 - Antonin Dvorák Piano Quintet in A, Op.81
12 - Antonin Dvorák String Quartet in F, Op.96 "American"
13 - Maurice Ravel String Quartet in F
14 - Béla Bartók String Quartet #2
15 - Dmitri Shostakovich String Quartet in c, Op.110
ThinkQuest 15 Greatest Chamber Works