For people interested in music broadly being categorized as 'neoclassical', I can recommend Qntal's 'Silver Swan' beside their other offerings of course. Although obviously done with commercial success in mind (and thus at times ripe with cheese), the album is done with competence and might appeal to those who fancy Summoning as well as Dead Can Dance.
Another ambitious project from the same niche is Ophelia's Dream who whose efforts are impressive despite their synthetic approach.
Yet one more recording I enjoyed lately is Vangelis' soundtrack to the movie El Greco. I don't know the film, but the music reflects the contemplation of a sound mind and is gently moving.
For people who appreciate Kraftwerk, Anthony Rother's early album 'Sex With The Machines' and other early works might be worth a try, although these are rather done with the dancefloor in mind; however, they are not without merit.
Some seem to enjoy the overrated Aphex Twin. For a superior listening, try Squarepusher instead. Good start: 'Ultravisitor' or the more recent 'Hello Everything'.
For folkies I can't stress enough my recommendation of In Gowan Ring. Look for 'The Glinting Spade' for a start. A real dark folk album for murky brooding nights is Alethes' 'Aletheia'. Sturmpercht create some genuine German alpine folk music that is pleasantly weird.
(some might disagree with the categorization of these bands as original folk music, but in times of societal uprooting and divergence as ours are, this may be more than valid)
An exhaustive minimal ambient Black Metal journey may be found within Fauna's album 'Rain'.