If you want instant Boards of Canada style sounds then the Cimmerian Caves effects unit we featured on AskAudio, back in July 2016, is one to consider. Good news is it will begin shipping next week.
If you're partial to Thom Yorke's Hearing Damage there's shades of it if you jump to 3:40 in the video above. And below is a new video showing the effects of Crimmerian Caves on a range of different sources. Also well worth a watch!