The Pashto speakers in the world are about 45 million. If you add those who have lost pashto but have pashtun ancestry to it, then pathan population would reach upto 80-90 millions. Infact if you split pakistani population racially e.g into pathans, jats, awans, rajputs, balochs, turks, arabs etc then pashtuns would become most numerous racial group of Pakistan. In afghanistan the pashto speakers form 42% of population but if you add farsified pashtuns to them then their percentage exceeds 60%.
Even Pakistanis in general consider non-pashto speaking pathans as "naqli", fake. Take the example of irfan pathan, he is called fake pathan by pakistanis even though he belongs to a pathan community of gujrat.
Following notables are pathans by ancestry but nobody call them pashtuns,
1- maulana mohammad ali jauhar and shaukat ali jauher (rohilla pathans)
2- Nawab bahadur yar jang (kakezai)
3- Sir sikandar hayat khan of unionist party punjab
4- Maulana abdul kalam azad
5- zakir hussain, former indian president (afridi of india)
6- Josh malih abdadi, urdu poet
8- urdu witers like mushtaq ahmad yousafi, Ashfaq ahmad.
9- cricketers like intikhab alam, abdul qadir, javed burki....
the list is very long...........
Reh gai baat imran khan ki , he belongs to Niazi tribe of mianwali, who are seriakized pashtuns....they are transitional group like pathans of hazara......they derive their culture both from punjab and kpk...Niazis have lost pashto but they have retained pashtunwali and tribal framework (qaum, khel, khul, clan)...I have been to mianwali several times, though their mother tongue is seraiki, many of them can understand and speak pashto.....
Langauge is such strong factor in shaping idenity, niazis of mianwali want to join seraikistan rather KPK. Hindko speaking pathans of hazara want their own province rather than sticking with kpk. Even the bilingual pashtun tribes of DIkhan (gandapurs, babars, miankhels etc) want to join seraikistan.