Yes, a 'klutz' is a clumsy oaf in this part of the world.

https://dictionnaire.reverso.net/francais-anglais/maladroit
It's sometimes difficult to make a (good) choice when looking for synonyms. ;-))

klutz n.

Le livreur était maladroit, trébuchant en portant le lourd colis.

The delivery guy was a klutz, tripping while carrying the heavy package.

Mon chat se comporte comme un maladroit quand il fonce dans la maison.

My cat acts like a klutz when she zooms around the house.

France, I am wondering what you mean by 'klutz'? I would tend to use 'clumsy oaf' here.
Oh, I've just been doing a bit of research, thinking it was a misspelling for the German Word 'Klotz', which can mean a clumsy oaf, and discover that it is an American expression (probably a take on 'Klotz', Mark ?)
Question for Mark, is it a well known expression in America? In Australia it is as far as I know, unknown.