There is very little I can add to this conversation, if anything, except for their influence on me as an aspiring writer. I read something (or more than something) by Howard many, many moons ago on a suggestion and a loan by a very good friend who was into him.
I was not impressed. Why? At that time I felt (and still do to a certain extent) that heroes are supposed to be virtuous. Conan was not. In the story, I read Conan's wife was kidnapped and he went on a journey to regain her. That is a virtue. Good man, Conan. However along the way he has a one night stand with an old flame. BOO! It made me wonder how much did he really love his wife. My impression Conan was not feeling lonely or missing an emotional attachment of his wife but was just plain horny. Real men control their sexual urges.
Upon today's reflection, I believe Conan was motivated by pride and possessiveness. Pride: I am Conan the King. Possessiveness: how dare you take what is mine? This indicates to me that his wife to him was an object, not a real person. This is my toy give it back!
This also now makes me ponder did Robert E. Howard look upon women as objects? Was he married? Did he have any girlfriends?
On the other hand, Tolkien's characters were motivated by the well being of others not just themselves. Tolkien's characters were willing and prepared to sacrifice their comfort and lives for the sake of others. This is a true virtue.
In my novel, most of my characters despite their flaws, in the long run, do the right thing for the benefit of others.
I know in real life this is not always the true story. Case in point, our civil war. Originally it was about preserving the union not freeing slaves (that came later).
This is one of the reasons I love fantasy. In it, as a writer, I can make people, creatures, and things behave the way I want them to behave. Others may not agree with me, but to a certain degree, I don't care.