Here's a few more acts from the early 00s that may have passed some of you by.
Magnétophone. More analogue and lo-fi compared to Autechre, but these were one of my favourite acts from that era.
Melodium. French act, think he's still going. I used to fucking love this.
E*Vax. Quite sparse and delicate, a bit like ISAN who I see were mentioned earlier in this thread. The singles were a bit better than this album, but they're not online anywhere that I can find.
Electric Company.
Wauvenfold
EU "Reframing". Autechre soundalikes from Russia.
https://eumusic.bandcamp.com/album/reframing