Do you mean painting artist or singing artist?
Orelsan and Bigflo et Oli
Well, in terms of a singing artist, it would be Indila. ^ ^
J'adore Florant Pagny
There are so manyyy, well I can give you a few.
My favs are definitely: Agar Agar ('I'm That Guy'), Christine and the Queens ('Here'), Vitalic. They sing in both French and English.
i meant a painter