favorite albums of that era for me:
imminent starvation / imminent - anything. saw him live once and he played an hour of no known released tracks, except for Tentack (as an encore, of course, collab w. iszoloscope actually) and they were all incredible. felt like a noisier aphex twin.
synapscape - so what - definitely they're best moment to me. the monokrom project was great too, even noisier.
winterkalte - drum 'n noise - pretty much says it all.
sonar - dislocation 10" / overdose simulation 2x-cd - a less complex and more blunt winterkalte perhaps...
still pissed i sold my eisengrau lp boxsets, if i remember correct a lot of harsh feedback with those beats. dkf / thorax lp on ant-zen is pretty rough noise and comes to mind similar to that stuff.
the Hymen sub-label of ant-zen released a lot of really great records, some on the noise side, but really more IDM i guess.. starts blurring the line here.
regarding Morgenstern, i have to say i like 'Zyklen' best. more emotional than other works, imo.
regarding vromb: jeux de terre, definitely his best. really a quite unique sound. really glad it was re-released on 2x-lp, and really cheap.
regarding hypnoskull: i like the first cd on ant-zen, but i think really more interesting to dig into is the earliest stuff on all those old tape labels.