Paul Raven, whom I've just discovered died 7 years ago.
Killing Joke, Murder Inc, Ministry (after Paul Barker who's also underrated, but mostly for being half of Ministry and not just bass), Prong, and Pigface as well as other parts of the spun-off Chicago Invisible scene bands.
I also give a lot of credit to Mark Chung (Einstuerzende Neubauten) for predominately being the only "real" instrument surrounded by jet engines, angle grinders, and assorted shopping carts. The lines are stark, simple, and fit the atmosphere.