Weighing in at over 2000 lbs, when you talk horse power, the Belgian Draft Horse is the measure by which all breeds must be judged.  While occasionally a bit temperamental, for the most part Belgians are gentle giants.  That said, given their awe-inspiring size and strength, they can be pretty much whatever they want to be.  They've pulled our wagons and plowed our fields, so we owe these enormous equines a sizeable debt of gratitude.  We humans are just along for the ride.