Are there any other Guinness world record holders? Recently I stumbled upon a post mentioning that One Piece managed to get a place in the Guinness World Records for most printed comic series by one author ever.

Are there any other manga / anime that managed to place themselves in the Guinness World Records? Or is Eiichiro Oda, with One Piece, the only one so far?
No, One Piece is not the only record holder: as shown in this article, "Kochikame Earns Guinness World Record For Most Volumes Published For Single Manga Series" with 200 volumes.