Hey man I have kept dogs all my life so I know little about them. If you have any love for animals you would never buy these breeds in Pakistan they are meant for cold climates and will not like the Pakistani heat. Unless you keep them in an air conditioned room year round yes year round, it is in humane to keep dogs like these in hot countries. If you are really looking for fierce looking dogs buy a Shepard or a Doberman (great dogs but need be trained well) they scare people. I have three pure bred boxers and trust me they may not look scary but people are scared of them cause people tend to be scared of dogs in general in Pakistan, plus the face can look a little aggressive and are very friendly dogs, they are supposed to be good judge of moods. I have owned labs before this and various other mixes but the boxers just have a total different level of love. However be aware pure breds in Pakistan suffer from health issues due to the constant inbreeding.
if you can afford it buy a mastiff that's a great dog huge and when it barks it shakes the whole neighbourhood.
This is my friendly advice to you