Well yes most Roxy Music is well . . . Not very intresting, though I should admit I was never really intrested in glam (unless you consider Iggy glam) . . .
But rememeber Eno wasn't in the band that long and the stuff he worked on was never really popular . . .
Also Eno always was doing side projects (well 69 to present), Music for Films just happened to be what most considered the start.
Yes, Kraftwerk was odd, just not groundbreaking in my mind, there were tons of other artists who were doing the same thing Kraftwerk just got out the door first . . .