Asdraguuhl, I would highly, highly suggest you check out some library music. It's nearly all instrumental, and there are some amazing composers who have done some wonderful pieces in the '60s, '70s and '80s.
I listen to classical library music myself, it's one of my favorite genres, and I think you should check out this album I just ripped from vinyl. Let me know if this is something you dig. It's a baroque LP by The Mayfair Baroque Orchestra, and is quite lovely stuff.
https://www.sendspace.com/file/cxnyfk
You're not going to find really intense orchestrations like Beethoven, but you will find some short, sonnet-like pieces that set a nice mood. Just don't expect "super-epic" but more like a light, easy listening, and you should be happy
Here's a few more recent rips of mine.
Cam CML 214 - Luigi Ceccarelli - Dark >
https://www.sendspace.com/file/n246u2 (this is an electronic/ambient album)
Patchwork MC 55 - Various - Classique >
https://www.sendspace.com/file/v8hbaa (classical pieces)
Spectrum SPEC 208 - Bobby Heath, Eric Peters, Robert Hunter - Nature (Static); Nature (Movement) >
https://www.sendspace.com/file/3m39uh (electronic ambient music for nature documentaries)
And I do believe this is all legal, because these albums were never released to the public, and they were given free to TV studios, etc., back in the day, so ripping them now and sharing them should be okay.