sorry if these have been suggested before
caribou - old stuff is more electronic, new stuff he uses more live instruments, the guy is a phenomenal musician though, especially on drums
tortoise - jazzy, laid back groovy music with a good amount of layers. Ae remixed 2 of their tracks, actually.
cepia - this stuff isn't insanely technical or genius or deserving of a subforum, but this guy knows how to write good idm tracks. he plays with dynamics very well
explosions in the sky - 5 piece, drum, bass, 3 guitars - these guys are not very technical at all, in fact a lot of their lines remind me of simple idm synth lines, but i have never ever seen any band so good at controlling dynamics.
i don't think any of the bands you described are in any way similar to autechre, but i freakin' love caribou, tortoise and explosions in the sky.