Answer: Astérix, created by René Goscinny and Albert Uderzo.
Some extra relevant information:
The Guinness Book of World Records has recognized the manga series “One Piece” as having the largest cumulative circulation of any single-author comic. Created by Eiichiro Oda, the series has achieved unprecedented success and popularity since its debut in 1997. With its engaging storyline, colorful characters, and vast world-building, “One Piece” has captivated readers worldwide, resulting in a massive circulation of its manga volumes. As of 2021, the series has surpassed a staggering 490 million copies in circulation, solidifying its place in the record books. The enduring appeal and enduring popularity of “One Piece” continue to fascinate fans and contribute to its remarkable record-breaking achievement.