Several options in the Sony range:
- Sony Zeiss 35mm 2.8 - very small, compact, excellent IQ (similar to the Samyang you have)
- Sony 35mm 1.8 - compact, lightweight, sharp but also sterile, close min focus
- Sony 35mm 1.4 GM - cream of the crop in terms of build, IQ, and price
The other highly regarded native lens are the Sigma lineup:
- 35mm f2 contemporary - top level build, great IQ with nice rendering
- 35mm 1.4 DG DN - almost Sony GM level, but more affordable in a bit larger size
- 35mm 1.2 DG DN - monster lens with monster IQ
Then you have the Samyang, Tamron, and all MF options…