Preheat the oven to 450°F (230°C).
Cut 3 pounds unpeeled russet potatoes into wedges. Place the wedges in a large stock pot and cover with cold water. Bring to a boil, and once boiling, boil for 5 minutes. Drain the potatoes and pat them dry with a clean kitchen towel or paper towels.
Put the drained, dried potato wedges in a large bowl. Add 3 tablespoons vegetable, grapeseed, or canola oil, 1 teaspoon salt, 1 teaspoon pepper, and 1/2 teaspoon garlic powder. Gently toss with your hands or two spatulas until evenly coated.
Spread the potato wedges in a single layer on a rimmed baking sheet. Roast in the preheated oven for 25–30 minutes. Use a spatula to flip the wedges, then roast another 25–30 minutes, until the potatoes are deeply golden and crunchy on the outside.
While the potatoes roast, combine 1 cup buffalo wing sauce and 2 tablespoons butter in a small saucepan over low heat. Stir until the butter melts and the sauce is combined; keep the sauce warm on very low heat.
When the potatoes are roasted, remove the baking sheet from the oven. Turn the oven to broil on the highest setting and position the oven rack in the center.
Pour the warmed buffalo-butter sauce over the roasted potatoes and gently toss on the baking sheet or in a bowl to coat the wedges evenly.
Evenly sprinkle 4 ounces freshly grated sharp cheddar cheese and 4 ounces crumbled gorgonzola (or your favorite blue) over the coated potatoes. Place the potatoes under the broiler for 2–3 minutes, watching closely, until the cheese is bubbly and golden.
Remove the potatoes from the oven and immediately sprinkle with 4 sliced green onions, 4 chopped chives, and 1/4 cup freshly torn cilantro. Serve hot.