I've recently discovered 1990's US indie band Neutral Milk Hotel. In simple terms they did two albums and disappeared. The first is a lo-fi, fuzzy and thoroughly enjoyable work "On Avery Garden" but their 2nd album "In the aeroplane over the sea" is more folky and has become regarded as a bit of a hidden classic.
There's a good deal of experimentation, odd instrumentation etc. and the results can be hit and miss but generally I found both to be well worth the listen.