The Mozart Clarinet Quintet and also his Clarinet Concerto are strong favorites of mine.
The Brahms Clarinet Quintet is another favorite.
When it comes to jazz clarinet, I very much like the clarinet in pre-bop music. Johnny Dodds, Edmond Hall, Pee Wee Russell, and Benny Goodman are some I like. Lester Young on clarinet is marvelous.
But in Bop, Hard Bop, West Coast, post Bop, I am not all that positive about the clarinet. I appreciate the skill of
Buddy DeFranco but find his playing rather cold. Tony Scott sounded better, to me, on baritone sax. A modest number of tunes on clarinet by Jimmy Giuffre, Art Pepper, and Phil Woods are nice, but preder the latter 2 on alto.