In the long dead Pakistaniat.com website, there was a survey about the greatest Pakistani leaders--I think then Ayub Khan and Zulfi Bhutto came almost neck to neck; on the bottom were Benazir Bhutto or Zia ul Haq. Zia ul Haq should be the real bottom because, by 1988, he had the absolute rule of Pakistan's 1/4th history till then. 1/4th!!!!! But that's for another topic.
Coming to the topic. Ayub Khan was the best gift to Pakistan ever after M.A. Jinnah. There are accounts about him taking personal interests in various development projects of Pakistan. There is an account by someone that Ayub even spent days in a tent working with a local official to oversee work on barrages (or some other project, I am sorry, don't recall) in Sindh; such projects were great for Pakistan and are still great for Pakistan. Ayub Khan was the best Pakistani leader after M.A. Jinnah!!
As to Zulfi Bhutto. You guys REALLY need to get over his role in the breakup of East Pakistan!!!?? There is no 'B' as in Bangal or Bangladesh in 'Pakistan'. It was never meant to be. Ayub had called them '4 foot tall men' in a pejorative way, years before the breakup. That was the mentality of the West Pakistanis for the most part. It was a 'Divorce Written in Heaven'. I wish them well from a distance. Bhutto was an opportunist, a tyrant and a demagogue. But he did not break Pakistan.
Great people are NEVER without fault!! Ben Franklin, MK Gandhi, Churchill, M A Jinnah... all of them. Zulfi Bhutto could claim to join such men as far as Pakistan is concerned.
Bhutto did a LOT of good for Pakistan during his capacity as a member of Ayub Khan's cabinet. The Chinese still credit him for bringing Pakistan and China closer when Pakistan was very firmly in the American camp. It was a tightrope walk but Bhutto did it. To the Americans by early 70s, China was the super Al Qaida of the World and yet Bhutto bridged the gap. And he many other things for Pakistan. Of those are notably outfoxing Indira Gandhi during Simla Agreement. That has enabled Pakistan considerable diplomatic room while still getting thousands of prisoners of war back and thousands of miles of Pakistani territory lost in the 1971 war back--not a small feat, is it?? Bhutto also reached out the rich Gulf Arab states and in exchange for a token help in the Israel-Arab war of 1973, won over tens of billions of $$ in labor import concessions and investments into Pakistan.
The bottomline is that: Don't look for angels in your midst. You will never find them. As I see Imran Khan--I see perhaps the most pacifist Pakistani Prime Minister since at least someone from the 1950s. As far as his achievements---he doesn't have the American largesse and the security umbrella that Ayub had. Ayub KNEW that he could station and fly spy planes on Pakistani soil on the Soviets and yet somehow Pakistan wouldn't face real consequences... and Pakistan didn't. Imran Khan doesn't have that kind of luxury of action-at least as far as I can see. And maybe that's good for Pakistan.