5% Nutrition Real Carbs + Protein is the honest hardgainer's tool: instead of chasing a giant calorie headline with maltodextrin and sugar, it's a clean whole-food meal whose size you control. The carbs are actual whole-grain oats, sweet potato and brown rice; the protein is a dairy-free beef-egg-chicken-chickpea blend; there's 6 g of real fiber and only 2-3 g of sugar, with no maltodextrin or dextrin derivatives at all. At roughly 260 calories per scoop it is deliberately not a one-shake bomb — you stack servings through the day to build your surplus, which is exactly how a thoughtful bulk should work.
It loses the top spot only because reaching a big surplus takes several scoops and the per-meal cost mounts. For anyone who flatly refuses to drink a sugar-bomb, this is the cleanest gainer on the list.