I've just come across the writings of Fritjof Schuon and they appear to be impressive. There is a hint of new-ageism about him, and having never heard of him before I have no idea of his general reputation apart from his wikipedia page. What exactly is his reputation within academic circles?
What exactly is his reputation within academic circles?
Well, it's hard to prove a negative, so let's just say this: he fails to appear in the Routledge Encyclopedia of Philosophy, an almost 10,000 page reference work.
As a point of comparison, we can point out that the REP includes 3 pages on Anna Maria van Schurman, who was (apparently) "among the few women to publish views on Counter-Reformation controversies concerning predestination and transubstantiation. Her autobiography served as an apology for the Pietist sect, Labadism."
In fact, it appears to be rather hard to come by any information on Schuon that was not published by his own press; one of the few independent reports I found was a report of cult-like behavior, and charges (later dropped) of sexual abuse of minors.