What Pokemon are good against ghost types?

The Ghost-Type has advantages over Psychic types, although Gastly, Haunter and Gengar are Poison as well so it is leveled outwhn using those three. They also have a huge advantage over fighting types since they basically can't be hit by them. The same goes for Normal type Pokemon, but then the Ghost Pokemon better have something else then only Ghost type moves or it will be an eternal battle :P. Ghost attacks are also super effective against other Ghost Pokemon.