Since this thread reminds me of the time the whole town tried to get gum out of Lisa’s hair, my vote is for Notebooks 10. I just started using it but I love that it stores files locally (syncs via Dropbox). I imagine with a powerful search app like Alfred and/or Houdaspot you’d be set. Another benefit is that when you search your phone files will also show up on spotlight search (drag down start typing the file name). The only drawback is that you lose the ability to find similar files. I created a quick overview of the mac and ios app. The syncing issues with Devonthink on iOS are likely the reason I’ll abandon Devonthink.
Here’s a thread on the app
https://talk.macpowerusers.com/t/notebooks-app-your-experience/9770/30
Here’s a video I made just now (I forgot to show that emails can also be saved)