I don't there is a WOJ about the island corrupting its Warden.  I think what applies here is the warning Rashid gave Harry in TurnCoat.  That also is the basis of the Council thinking Harry blundered his way into becoming Warden.

APG

  I think there is a WOJ that Margaret Le Fay's mother was mortal.

APG

Ref:  https://www.paranetonline.com/index.php/topic,53049.msg2318077.html#msg2318077

  The above is a post I made a while back on a similar subject.

  It has been suggested before that perhaps the relationship between Justin DuMorne and He Who Walks Behind is not what Harry thought it was.  It is possible the HWWB was the one in charge.

APG

https://www.fanfiction.net/s/8375964/1/Houses-of-the-White-Court-Dresden-Files

  There was a fanfiction speculating on that a while back.


APG

  I think there might have been a fanfiction with that plot.


APG

Ref:  https://www.fanfiction.net/s/8375964/1/Houses-of-the-White-Court-Dresden-Files

  It's been done.  The above is a fanfic about another house of the White Court.

APG

  There is a lot we don't know about Bob.
  Bob was used by Kemmler for about 100 years, up until Kemmler's death in 1961.  We don't know who had Bob before then, so Bob could have met Ebenezar then.
  Also, as the Blackstaff, Ebenezar would have been sent after Kemmler.  There might have been several confrontations between them that ended with one of them escaping the other.  Kemmler might have captured one of Ebenezar's staffs, and given it to Bob for study.
  It would have made sense for Kemmler to order Bob to learn as much as he could about Ebenezar.  He would wanted any possible information about one of his most dangerous opponents.

APG