I have a number of playlists on YouTube with music that I use for writing.
Two Epic Steps -- featuring music from Two Steps From Hell and similar groups
Zimmer and Jablonsky -- with soundtracks from Hans Zimmer and Steve Jablonsky
Amethystium -- with music from Amethystium, Mythos, and David Arkenstone
Battle Music -- with music I play as I write battle sequences
Dragon Music -- music to accompany my Dragon stories
Rehatching Climax -- music to accompany the epic climax of my last novel
Final Frontier Novel -- unofficial soundtrack that I'm compiling for my current project
Also on Youtube, I often listen to independents like Ivan Torrent, Mortifer, Peter Crowley, BrunuhVille, R. Armando Morabito.
I also have a large CD collection that I still sometimes listen to when I write. Mostly instrumental soundtracks (ex: Christopher Franke's Babylon 5, Hans Zimmer, James Horner, John Williams, Howard Shore) and New Age (ex: Christopher Franke, Secret Garden, Amethystium, Vangelis).
I'll have to look up your playlists on YouTube, F.J. I've got some Zimmer, Arkenstone, the superb work of CF on Babylon 5 and also lashings of Horner, Goldsmith and Shore. But I have found generally they are still too 'in-your-face' and that I prefer more ambient pieces to work to.
That's why I've also got virtually every soundtrack ever done by Trent Reznor and Atticus Ross. I find their minimalist, electronic drones to be very helpful to write to.