Marvel produced Conan the Barbarian comics mostly during the 1970s, written (again mostly) by Roy Thomas and illustrated by Barry Windsor-Smith, John Buscema, Alfredo Alcala and a few others. I'll admit to having read none of those comics so I'm no judge if they are any good, certainly Savage Sword of Conan seems to have been a popular title and I did read one issue of that years ago as Scottish artist Colin MacNeil illustrated the story.
I know Conan the Cimmerian through the books of Robert E Howard which I read mostly in my teens and the two Schwarzenegger films 'Conan the Barbarian' (1982) and "Conan the Destroyer' (1984). So my rendition finished just today I feel leans more towards the fantasy look of the character rather than the comics version.
Just to add to the Marvel A-Z here's some older ink sketches.
C is for Captain…