Few production companies are as synonymous with horror as Blumhouse, whose approach to genre filmmaking relies on modest budgets, wide releases and talented creators who are mostly given free rein. That this formula has proven wildly successful should come as no surprise to anyone familiar with the way Hollywood operated before it focused almost exclusively on superhero movies and other tentpoles, but it’s refreshing all the same. With “The Black Phone” opening tomorrow and a slew of projects (including the already controversial “They/Them”) on the horizon, here’s a look back at Blumhouse’s best horror offerings to date.