Do you think Charles "The Hammer" Martel was a great man?

The account you've given is a 19th century fantasy and not a sober rendering of the what the historical sources tell us. The Battle of Tours/Poitiers was nowhere near as significant as Gibbon and other historians made it out to be. Abd-er-Rahman was leading a raid in force, not an army of conquest. Christian Europe was under no great threat of being swamped by Islamic hordes. Nor did the Muslim leader die in the battle, the Muslims slipped away during the night. And the epithet "the Hammer" was not given to Charles until the ninth century, to distinguish him from his grandson Charles the Great (Charlemagne).

Was he "great?" I don't know. He was significant, certainly. He was a hardball politician and a dogged warrior, went from being the unwanted bastard son of the previous Palace Mayor as a teenager to get control of the family assets and the government of the Frankish kingdom. He consolidated Frankish power and laid the foundations for Charlemagne's later empire, and promoted missionaries to expand Christianity at his frontiers. On the whole, an impressive career. I'd hardly make him a saint, and he didn't define an era the way his grandson did, or historical figures like Alexander the Great, Caesar Augustus, or Elizabeth I. But he was certainly significant.