I'd like to get file uploads, à la Dropbox File Request, but with the security of e.g. SecureDrop.

This should give the uploader as much security as possible; eg
* no logs
* optional space for text (delivered as email with the file upload notification), eg to identify themselves as much as they want, explain what the files are, etc
* route through a proxy or the like if on open web
* available as Tor service
* encrypt in browser to a GPG key I provide, or at least to my ProtonMail key
* etc (copy SecureDrop, Mega, etc)