For high-power position control you will probably have to implement your own feedback loop. You need a motor capable of the torque and speed, drive electronics capable of providing the necessary power, and a way of measuring the current position. The desired position is compared to the current position and a PID (Proportional Integral Differential) calculation will determine the speed and direction to drive the motor to reach the desired position.
How much torque do you need and how fast do you need it to move? You can se a gera motor to get more torque at the expense of speed. More torque and more speed will require more power and thus a bigger motor and heftier power controllers.