The Ottoman Empire conquered more land for Islam than any other Muslim Empire or regime and was more powerful.
In terms of adding land to a muslim empire that would be the initial muslim expansion from aprox: 623-1050s, which included Mesopotamia, Caucasus, Persia, Levant, North Africa, Anatolia, Iberia, Gaul and Greater Khorasan, Spain, and others.
From The History of the Decline and Fall of the Roman Empire(by Edward Gibbon):
Under the last of the Umayyad, the Arabian empire extended two hundred days journey from east to west, from the confines of Tartary and India to the shores of the Atlantic Ocean. And if we retrench the sleeve of the robe, as it is styled by their writers, the long and narrow province of march of a caravan. We should vainly seek the indissoluble union and easy obedience that pervaded the government of Augustus and the Antonines; but the progress of Islam diffused over this ample space a general resemblance of manners and opinions. The language and laws of the Quran were studied with equal devotion at Samarcand and Seville: the Moor and the Indian embraced as countrymen and brothers in the pilgrimage of Mecca; and the Arabian language was adopted as the popular idiom in all the provinces to the westward of the Tigris.
The ottoman empire was small potatoes compared to the expansion of the muslim empire.
In terms of Power...
Yea look at the land controlled and then take a look at the science that was being done by those countries during that time.
Try again junior.
