Well, most of his solo violin works and some of his violin concertos are worthy, either harmonically enjoyable or extremely virtuosic.
I would recommend his 36 Preludes for Solo Violin for exercises, his Bach Sarabanda variata, cadenzas and 5 Grand Caprices for difficulty and violin sonatas for mature romantic harmonies ( tho it needs piano)
It won't be complete for violin concertos to be played only with violin part, so I'm not recommending them here for musicality.