I feel the same way actually, and can corroborate it with some guy in the front row for the premiere of the X-Files movie that yelled "I LOVE YOU SCULLY" during the titles. Still had to post the article because it was an interpretation I hadn't thought about before.
I think in a lot of ways Scully actually is the hero of the show. She often narrates the episodes, and the show even starts when she is assigned to the X-Files, while Mulder has apparently already been pursuing them for several years. Mulder learns more and more about the "truth", but he is always after what he's after. The story arc is that of Scully, from green agent, to somewhat believer, to mother, etc. Obviously, it's all academic, as the show needed both characters to succeed, but I think the Mulder/Odysseus comparison is not really correct.
I would agree with you regarding that the focal point is from the narrative standpoint, which is Scully. However the most interesting character is by far Mulder. But that's often the case in most stories. Usually, the narrator isn't the most exciting character. I should mention that I've not watched the entire series yet, but I am inching my way through it. -it's great television.