I’ve seen Bjoern’s Sample Mapper before, but never actually tried it. Is it easy to use or do you have to configure a lot of stuff before it does what you want it to do? By the way: you can access those Pro features (like automatic mapping by pitch) by switching to the demo mode in the free version of TX16WX.
If you got any questions regarding the SFZ format / creation of libraries in the SFZ format, feel free to join the Discord: https://discord.gg/NMWcmkB
Personally I’m not the biggest fan of TX16WX because of the cluttered interface (not very good interface / UX design). I’ve also experienced difficulties trying to import some EXS libraries into it. Sometimes the software would repeatedly ask me to point out the sample directory. But the best way to go about it is to try it yourself. If you have any questions, the developer is over on the KVR forums and typically quickly to respond: https://www.kvraudio.com/forum/viewforum.php?f=213