Khan was a surname from Mongolia, orginially of Buddhist origins.
Changez Khan was not a muzlim he was buddist animist from Mongolia , Khan was title of great chief , Subsequently Changez swept across central asia and conqured persia and Damiscus and destroyed much of the Muzlim world at that time.
The defeated subjugated people of Central Asian region of Afganistan and Pakistan took the title Khan the name of thier Tormenter.
Changez khan and Kublai Khan ( again not muzlim) sired many offsprings as a result of thier conquest and some people in Af-Pak claim that they have blood of Changez.
It definitely has to be Aamir for his cerebral appeal, poise & elegance. Salman Khan is just a dumb beefcake and his appeal is only the front benchers. SRK is the biggest ham one would ever see. Moreover SRK looks well past his USE BY date as he has started looking old & haggard!