Preheat the oven to 425°F and place the rack in the upper-middle or center position.
Pat the chicken thighs completely dry with paper towels.
Let the chicken sit at room temperature for about 30 minutes if possible, and trim excess fat if needed.
Season the thighs with kosher salt, black pepper, paprika, garlic powder, and any optional herbs, applying seasoning under and over the skin.
Arrange the chicken skin-side up on a rimmed sheet pan, preferably over a wire rack if using.
Add vegetables according to cooking time, starting with root vegetables first and quicker vegetables later.
Roast bone-in, skin-on thighs for 35 to 45 minutes, or until the thickest part reaches at least 165°F.
For especially tender results, cook the thighs closer to 175 to 180°F.
Rest the chicken for 5 to 10 minutes before serving.