Do a bent over lateral raise on a glute ham raise (GHR) station. This targets the glutes, hamstrings, spinal stabilizers, and postural muscles. In the video, one of my NFL athletes shows how it's done as we bulletproof his shoulders and posterior chain for the demands of the season.
The torso position ends up being perfectly parallel to the floor so it's impossible to cheat. Your rear delts will get absolutely scorched.
Most lifters end up using excessive body english and an overly upright torso position when performing bent over lateral raises. They use their traps, upper back, and side deltoids more than the posterior portion of the shoulders, negating the desired effects. Doing these on a glute ham raise station eliminates these issues.