I know you personally are just looking for overall bulk rather than lean gain, but I am gonna list products for both so others viewing this thread can have the option.
Lean Mass Gainer = Lee Labrada's Lean Body Mass 60; Gaspari Nutrition's Real Mass; Optimum Nutrition's Pro Complex Gainer
Overall Bulk/weight gain = Optimum Nutrition's Serious Mass; Twinlab's Super Gainer's Fuel
For your situation, if you are just wanting to gain weight, without regard to whether it is fat or muscle then I would go with Optimum Nutrition's Serious Mass. That stuff has 50gm protein, 5gm fat, 251gm carbs, and 1,250 calories PER SERVING!