It makes no sense to me to go to the outliers of the literature if you do not have familiarity of the core repertoire, so of course, unless you have played them already, I think you should expand your list to the 18th century:Mozart's trios in E Major and C Major are splendid and basic pillars. The G Minor and E Flat Major Quartets even more so.Beethoven's Archiduke and Schubert's B-flat Major trios are also basic.Schumann's and the Brahms G Minor Quartet are simply gorgeous (Thal, you there?)You don't have to play all that, but I think it is nonsense to explore the more obscure corners of this literature without at least having some familiarity of these middle-of-the-road works.Then the literal answer to your question would probably include Faure quartets and trios, the Franck and Shostakovich trios, and the Brahms trios (all three of them absolute masterworks).There is some Dvorak that is very worthwhile, and of course perhaps the best trio in the entire literature is the imposing Ravel trio, but all that stuff is pretty hard. The Mendelssohn trio is quite hard, so i would leave it out for now.One last note: if you have done absolutely NO chamber music before, the Haydn trios (in modern times you play them with Violin and Viola - they are for Barytone) are a very goo dplace where to start.