Inquisitor is perhaps what you’re after - the rulebook is now available for free PDF download.
It used 54mm miniatures but they were expensive and frankly unnecessarily large, most folk play with the normal-sized ones and call it Inq28.
I used to run Games Workshop’s Inquisitor tournament games and having Dan Abnett, author of the Eisenhorn and Ravenor books and more, shouting “give me more cows!” so he could stampede a player’s characters into the mud was a highpoint.
