Certainly, from Renaissance times until the mid twentieth century Western philosophy developed in an atmosphere of Classical hero-worship as its forefathers. As with the arts and science, this originated in the Renaissance/Enlightenment humanist reaction to the developing absurdities of Christian dogma and entrenched tradition, a reaction typified by a belief in the Classical period as a "golden age" to which one aspired to return (itself ironically inspired by the Church's return to Rome and the rediscovery of buried antiquities). But it had the effect of cementing a chauvinist view in which other cultures were treated as primitive and ignored.
The problem of primacy is compounded by the vast scale of historic destruction; the Greek Alexandrian Library and Plato's Academy, the Buddhist university and library of Nalanda, the Confucian purge of Taoist literature, the effective extinguishing of Zoroastrianism, to name but a few. So much that we can never know of has been wholly lost, what survives today is but a fragment of the total reality.
In the West, much Greek work was lost during the Dark Ages; much left to moulder, unique and priceless survivors scraped clean and overwritten. The bulk of it was only recovered with the reconquest of Spain, where the Moors had had more respect for booklearning. But the West soon forgot its debt to those Islamic stewards in its determination to set itself up, first as a Christian culture and later as a self-bootstrapping European one. As Eastern ideas filtered through they were treated either as primitive or as derivative of Greek originals; had not Alexander the Great conquered Central Asia and even northern India? They were more appreciated by artists than philosophers.
In the first part of the twentieth century the strictly atheistic and materialistic positivist ethos took hold in the West, inspired by both formal logic and the rise of Communism, and continued the chauvinistic stance.
But since the failure of that agenda and the rise of quantum weirdness from the 1960s, the Western tradition has slowly been widening its horizons and rediscovering what has lain alongside it in plain view, constantly reintroduced by traders for those who had eyes to see, for thousands of years. Lao Tzu, the Buddha, Brahminism and so on are now understood as antecedents to certain Greek schools, not their pale shadows. (Meanwhile, archaeology is revealing that Alexander's legacy did push art the other way, bringing Greek artistic influence, even artisans, to the East).
Ultimately, who in the past were the deeper thinkers? Too much has been destroyed for the truth to be known. The Western habit of drawing conclusions solely from surviving direct evidence has misled us, just as pure observational behaviourism cannot reveal the nature of thought. Every civilization had, and still has, its deep thinkers, just some had disciples and some did not, some never wrote it down and others have been lost. Greek dominance is a myth, born of a desire to escape chauvinistic dogma but sadly becoming one of its own.