There's nothing to beat power and jump shrugs for direct trap development. Use your whole body to move good weight - you should be getting air beneath your heels - and then use the traps to attempt the hopeless proposition of holding the bar up. Use very heavy weight, more than your deadlift 1RM, and you'll need straps.
Bench-work and incline DB work will hit front delts strongly. One of the banes of bench-work for many BBers is an over-developed front delt. Very few people interested primarily in appearance complain about front delts lagging.
Overhead pressing will result in superior delt development, which is what this thead is about, more than any other form of work. Primarily hitting side delts, all heads of the shoulders are worked hard. The main choices are strict military press, push press and behind-the-neck press. The BTN press needs practice to get right and many view it as contra-indicated.
Rowing and deadlifting will hit the rear delts hard. For rowing, your best choices are the Pendlay row or the one-arm, bench- or knee-supported DB row. It's highly advantageous to keep the torso parallel with the ground when rowing and to pull hard and fast.
Don't allow yourself to get involved in upright rows unless you're tired of having a functioning rotator cuff.