That's exactly what PAK team is missing for last 15 years - a bit of aggression & attitude. Azhar is really nice kid - his mom & wife would certify that, but it doesn't help much.
Wahab could have been, just after WC, but he is too old now to invest. Next Captain must take PAK to WC 2019 (or at least to the qualifiers).
Babar can be, but PAK plays better under a bowling Captain, hence there is no other logical choice than Aamir. Babar can be made his deputy.
Sarfu is not bad, but his age, work load & fitness has to be considered. Once he is made Captain, he'll do exactly what every PAK WK did once they were confirmed in the team - bunk training & survive on his secondary KPI - batting, which is going to effect his keeping. Till 2006; KAkmal was the best gloves man in world along with Boucher (Not me, Ian Chappel said that) - then PAK made him opener & Inzi, Malik made sure that no one comes close to him (his marriage didn't help either), so we have seen KAkmal V2.0.
There is a reason why Allen Knott, Rod Marsh, Jeff Doujon, Ian Hilley, Syed Kirmany, Les Ames, Godfrey Eveans, Willy Grout or Bert Strudewick were hardly made even deputy. Mash Allah, PCB has appointed Imriaz, Bari, Moin, Latif, Sarfu Captain & on top of that had played Moin as specialist Captain, with Latif keeping.