There were his illustrations of DC Superheroes, like Hawkman and Green Lantern:
His action-adventure works, including Tor and his versions of Tarzan, Conan, Kull, and Solomon Kane:
And then, of course, I also remember the ads for the art school Kubert founded in New Jersey. Among its graduates were his sons, Andy and Adam, who became comics luminaries in their own right.
Thank you, Joe Kubert, for decades of work that entertained and inspired generations.
And thank you for Conan the Barbarian Annual #6, summer 1981, which remains one of my favorites.