As I read through my Appendix N collection, I can't help but note the fabulous covers on the Berkley Robert E. Howard collection.
Ken Kelly, the cover illustrator for that series, has a style reminiscent of Franzetta. I'm drawn to his covers for another reason though. All of his illustrations are wrap-around covers, thus explaining the positioning of the hero, and the action, in the bottom right corner. These wrap-around cover remind me of another one, that being the David Trampier wrap-around cover for the Advanced Dungeons and Dragons Players Handbook.
Not all of these Ken Kelly covers are of Conan, of course. Black Vulmea, El Borak, Almuric and several others are represented as well.