Here are mine, listed alphabetically by artist.
Ambulance -
The Curse of Vale Do Lobo (2003)
Incredible IDM album that really feels like a story - it's varied in style and mood and keeps you interested throughout, without feeling like it's a bunch of tracks by an artist trying to make a certain style. Wonderful for a walk in nature or elsewhere.
Architeq -
Gold + Green (2009)
Not quite sure how to describe this one. IDM at its roots, but it tends to walk the line a little bit with glitch-hop. Similar to
Kelpe, even though I'm sure that doesn't help as I haven't seen anyone here listen to him either. Very clean production, warm beats.
Datassette -
Datassette (2008)
What to say about this one...IDM I guess. It doesn't remind me of any other artist in particular, but it's very good. There.
Eedl -
Everse (2007)
Very nice melodic and chill IDM, most similar to
Plaid and
Ochre I'd say.
Jaga Jazzist -
A Livingroom Hush (2002)
I'd known about these guys for a while, and finally checked them out with their 2010 album, which is quite great. So I dug a little into their backcatalog and really like this one. Sort of a mix of Nu-jazz and IDM.