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Deadlifts and all variations (rack, sumo, etc), compound rows and all variations (Bent over, t-bar, heavy cable), and compound vertical pulling (chin ups, pull ups, same with lat pulldown cables, all variations).
also its important that you perform these exercise correctly and transfer the weight onto the back muscles, nice and controlled full range reps! get stronger over time keeping good and eating good and you are doing all you can do!