Beautiful Classical Smaller Pieces, duo,trio,etc

With my own ears I heard the great pianist,Arthur Rubenstein, say the Schubert Op 163 Quintet is the greatest piece ever written and that he wanted it played at his funeral.

My own personal favorite piece, period, is the Brahms Op 78 Violin Sonata in G major.
My favorite recording of same is the Josef Suk/Julius Katchen ,Decca 466 393-2 .

The Bartok Quartets are masterworks as well.
Another modern composer who wrote some seldom heard, but beautiful quartets was Villa-Lobos .

Well. IMO the daddy of them all from a modern composer, is String Qt. # 2, Intimate Letters" by the great Czech Leos Janacek .

I thought surely someone would of mentioned it by now, but as nobody has, I'll mention a work that belongs in all collections .

Carl Nielsen's Op. 43 Wind Quintet , up there in Mozart winds league with modernistic melody structure .

Vienna Quintet on Nimbus is good .

Think about it Tubegroover, Schubert had written more now acknowledged masterworks by his death at 31 than Beethoven or almost any other composer had by that age.
No less a figure than Brahms, who may well have been the most learned of all composers, with the music of 400 years at his fingertips, said Schubert was the greatest composer who ever lived.

The other make changes and develop themes.
Schubert comes at you from 20 directions at once and they are all related .

Frogman, re Janacek, on hope you've played him or looked at scores.
I keep trying to spread the gospel on Leos but folk find him too "dissonant" .
I hear him as the epitome of that old-time Czech tonality
, as far as my amateur ear can tell he writes at both extremes of the staff and through fabulous technique makes the whole seem right down the middle. To me he is sui generis exemplified , ever fascinating . A true musical genius !

Frogman, I am eternally in your debt.
"Miladi" was one of the pieces I had read about but never heard.
The version I found locally was by Ensemble Walter Boeykens on Harmonia Mundi . Both the group and work are of the highest order, reminding me of that master of masters in Janacek,Rudolf Firkunsy, playing "On an Overgrown Path" with even more color than a solo piano could.
I swear Janachek could give even Schubert lessons in dynamic graduation!

It took me several minutes to compose myself after "Miladi".
I would think it one of those pieces where a knowledgeable classical audience would pause before putting hands together?

Ptss, it is indeed remarkable than a youth of 16 could write
such a mature work at the Octet.
It is equally remarkable that Janacek could write such
a youthful work as "Miladi"(youth in Czech} at over 70
years of age .