Re: who will be the next president , is Dr Qadir is the best
There is no way Pakistan can afford to make Dr Abdul Qadir Khan as President. He is a suspected (self-admitted) nuclear proliferator. Make him President, and Pakistan will suddenly be both the laughing stock of the world as well as a pariah.
President is more of a ceremonial post, especially once they remove 58-2-B. Anyone else from your list will do (I doubt IK or Qazi are even real candidates for Presidency). Or it could be some other high profile leader from one of the two larger political parties.