Protip - If you like scrolling for inspiration on what to download, check out JustWatch. It’s a site with clean UI that catalogues shoes across streaming platforms.
No piracy, you do that yourself with Plex and the *Arr.
I don’t have a direct answer, but I will say be careful about giving them to Goodwill or what-have-you, or at least check first. I donated a mound of great contemporary books and the guy receiving them said they throw out anything that has marks on the page side or any wear on the cover.
Not to say all thrift shops toss them, but some do.
Great question, and I have two to suggest:
Cattle Battle - Atticus Ross and Trent Reznor. Builds with a punching industrial sound that’s rife with Reznor’s flavour, and climaxes hard with a moment of quiet before the impact.
Straight for the Sun/Desolation - Lamb of God. Intro is a quick breath and pure fury through Sun, then a seamless transition to Desolation which is a machine gun metal blast to the face.