So, according to Ye Olde Wikipedia, The Human League used the following synths and other bits of kit in recording their classic album Dare (now available as a reissued double album with bonus tracks and Fascination. A must for all self-respecting '80s music lovers):
Casio M10 Casio VL-1 Korg 770 Korg Delta Linn LM-1 Roland Jupiter-4 Roland MC-8 Roland System 700 Yamaha CS-15
Suffice it to say, I should very much like to own these. Sarah would, in all likelihoood, say, "but you've got enough keyboards!!!" (She's wrong. I've only got four. And anyway, the Roland MC-8 isn't a keyboard, so that doesn't count.) In fairness to her, most of them I suspect are available in softsynth form, or at least as near as dammit is to dommit soundalikes, but, y'know, that's not the point... :-)