Most of those are fine I guess: GitHub - awesome-selfhosted/awesome-selfhosted: A list of Free Software network services and web applications which can be hosted on your own servers
I’d say that a Send with basic auth middleware exposed for a few minutes (with Cloudflare tunnels or Netbird’s or anything Grok-like really) is a cool way to go for a quick and temporary (yet still secure) endpoint.
I recently tried to backup 400GB of local data on an S3-compatible cloud provider, it ingested it extremely well and fast[1]. So given that, you can very easily wire that in the same way + encrypt it before upload.
And Send also gives you plenty of small niceties like password prompt, number of download etc…and it works with a CLI-only too. 
If not enough, you could always have a Wireguard/Netbird shared with a friend to remotely connect to some kind of storage straight into your homelab (SMB, Nextcloud).
Coud also be as simple as exchange of SSH keys + rsync between your 2 machines directly.
Some of my other recommendations in a previous comment.
Some people agree with me apparently.
Joke section
You can always split it on smaller chunks, ship it on a floppy disk (or maybe even an M-disc) and send a truck to the person for a DHL delivery. 
I mean, this is also how they get you with their egrees fees down the road
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