Eh I typed out a very long post and lost it all so I'll retype the short version.
Kava root powder is good if you haven't tried that one. Know you've tried all the herbs, but alot of people get bad kava root, don't give it enough time, or screw up the prep.
Amitriptyline, cyclobenzaprine, trazadone, and doxylamine are all good, but all of them besides trazadone may last too long. You just need to keep trying things until you find what works for you. Don't know much about baclofen, but it's certainly worth a try

doxylamine is an antihistamine btw. You're going to be hard pressed for anything non-recreational that isn't also a dirty drug. Of course, you can experiment with melatonin. It's quite safe to take in higher doses than what most packages reccomend
And c'mon guys. OP has clearly said multiple times now that they're not interested in rec value. Any more threadjacking with discussions on rec value will be infracted :/
EDIT: If you're looking for a short acting hypnotic to use only a couple times a week, z-drugs fit the bill perfectly. They do have some potential for abuse/dependency, but dependence is highly unlikely if you're sticking to recommended doses only a couple times a week.
Also, I forgot to mention suvorexant! That's a next-gen sleeping med that may be very good option for you. Not a dirty drug by any means.