Haven't found any, certainly not any with active seeders. If you know of a tracker (that doesn't require super special invites), I'm all ears.

S01-03 only exist in SD, from S04 onwards Full HD files are available on all trackers that I happen to have too.

What is the vpn of choice these days for bittorrent?

there's only one that's not extremely shady and has working port forwarding. If you don't need the latter, just stick to Mullvad.

What is the one with working port forwarding?

Proton, at least for me

PIA also supports port forwarding from non-US regions. And the Linux solution is better and provides a stable port, unlike Proton's 'run this command every 60 seconds and hope'.