Chrno Crusade, Hellsing Recommendations
A "fight fire with fire" sort of theme. Hellsing uses a badass vampire to fight other not-so-badass vampires, and Chrno Crusade uses a badass demon to fight other not-so-badass demons.
Both are from the same producer, artwork and overall feeling is pretty similar. In both animes are the main characters an important part of an origanization which is fighting against the evil.
Both have supernatural beings involved; Chrno Crusade with demons and Hellsing with vampires. They also use one superior monster to fight its own kind along with a blond haired girl who is bound to the monster by some sort of means. These two series also give off a "Christian feel" to them since there are religious phrases/prayers uttered when demolishing an enemy such as amen. In addition, there are scenes with churches, crosses, and priests. Chrno Crusade and Hellsing also use man-made weapons for battle (guns).