Squats, dead lifts, and bench presses, the only three things needed to build overall mass if done correctly.
Old school, but very effective if done with heavier weight and low reps, 3-5 sets each. Any of these will build overall core strength and size.
The guy I train with used to be a professional bodybuilder and he does not go in for the fancy new stuff.
Sometimes the basis exercises are the best, and it has certainly improved my strength and size.