One of the comic artists that I have read most, copied most, learned most from, and in spite of this never really considered one of my favourite artists is the French cartoonist, Jean Giraud, also known under his pseudonym: Moebius.
I do have a weird and complex relationship with this man's art.
There is a lot of film out there most of it in French, but here is a video portrait from the BBC - which is in English. It sports fascinating personalities like Philippe Druillet and Alejandro Jodorowsky.