It’s hard to go wrong with anything Al Jourgenson related (Ministry, Revolting Cocks, 1000 Homo DJs, Pailhead, etc., etc.). The closest to “hard techno” that Ministry really came that a non-diehard fan would like would be Land of Rape and Honey.
If you’ve got a sense of humor, Laibach’s WAT is an excellent choice and fits the “hard techno” much closer than anything else really, except possibly RevCo’s Big Sexyland.
Skinny Puppy’s Rabies is about as hard as it gets without too many guitars (and was produced by Grandpa Jourgenson) and you’ll see where Trent got a lot of his thinking.
Front 242’s >>Tyranny<< For You would likewise probably appeal to your tastes.