BookBarbarian
Expert Long Rester
Personally I disagree with 9 and 10. I've never thought of Conan as fitting the D&D barbarian class, course I've only ever read the Howard, Decamp, Carter novels (Lancer/Ace books) and just flipped through the comics.
I've only read all the Howard stuff and I'd peg him as Barbarian over a Fighter. Conan's abilities spring from the fact that he was born and raised in the harshest of environments, not anything obtained my training.
Just a few more things to add to the conversation. In one story (I'll try to track it down) Conan is made commander of an army and given a plate armor, however he is uncomfortable in it and before they go into battle he is back into his more comfortable chain and leather. This is about the best literary example of not being proficient in heavy armor that I've seen. Also in the Phoenix in the Sword he doesn't even get completely into his Armor before having to fight a score of humans followed by an ape like demon. I think he has more durability than just high level hitpoints.
And while Conan doesn't get frothing at the mouth rage, he certainly has a primal/natural aspect to his fighting that is different from every civilized fighter he faces.
While he does steal things I would never put levels of a 5e Rogue on Conan. While I could see expertise in certain skill like athletics, I see no evidence that he has thieves tools proficiency.
Personally I'd re-fluff a Tiger Totem Barbarian for Conan, it accounts for the extra skill proficiency he seems to have. I'd refluff the spells to more mundane ways of getting information. Like recalling a bit of lore learned from Elders at a Cimmerian fireside.
An Outlander Champion that does't use heavy armor could also be a really good fit, but I just think that the base barbarian does have things that fit the character really well.
I guess the Champion subclass on a Barbarian class would be pretty close to ideal for me.
And while it's not straight 5e the 3rd party Adventures in Middle-Earth has the Foehammer subclass for a Barbarian, and I think it fits the character really well.