Clovis conquered the Gallo-Roman enclave of Soissons around 486 CE. He took over the rest of Gaul for the Franks. He invaded eastward and stopped the migration of peoples from the east into western europe--probably his greatest achievement. Inasmuch as converting to christianity enabled the franks to be better integrated with the rest of europe that was also an achievement.
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Charles Martel (A.D. 688-741) consolidated Frankish power in his region, halted the advance of Muslim armies into Western Europe, laid the groundwork for a new Frankish dynasty and developed military concepts that would be important for hundreds of years. He is one of the most important figures in the early Middle Ages
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