Sometimes classic and simple is the best, like in the case of chicken paprikash. You could fancify it but really there's no reason to!
quartered and thinly sliced
Combine kosher salt and 1 teaspoon freshly ground black pepper. Pat chicken dry and rub the mixture all over. Place a large Dutch oven or saucepan over medium heat and add oil. When it smokes, add chicken, skin side down, and cook until well browned, about 3 minutes. Flip and repeat on second side. Transfer chicken to a plate and drain off all but 1 tablespoon of the drippings.
Return to stove on medium heat, stir in the onions, paprika, and sugar, and season with salt and freshly ground black pepper. Cook until golden and softened, about 3 minutes. Add potatoes and broth and scrape the pan to incorporate any browned bits. Add chicken, bring to a boil, and then reduce heat to medium-low. Cover and cook until chicken is cooked through, about 30 minutes. Remove chicken to a plate and cover.
Bring sauce to a boil over medium-high heat and cook until slightly reduced, about 10 minutes. Remove from heat, stir in sour cream, taste and adjust seasoning, as desired. Add chicken, turn to moisten in sauce, and serve.