The issue is murky because, despite the purported exactness of the term, "Aedra" is still subject to interpretation, and how it is ultimately used may even be subjective. Aedra and Daedra says that "ancestor" is usually the definition of the term, implying that there are other definitions with different connotations attached. It's the elven word for "ancestor", but does that mean it should be construed as "elven ancestor", or could anyone refer to their ancestors as the Aedra? The book isn't even really clear on its face how the Dunmer typically understand the term despite explicitly mentioning them.
If Aedra is defined as "creators of the Mundus" (which is, after all, how the elves view their ancestors), then Talos could be understood to be an Aedra. If it's defined as anyone's ancestor, then the world of men might consider him an Aedra. If it's "elven ancestor", then probably not.