It is reported in the Silmarillion that when Finrod Felagund first met the people of Beor, he had been hunting with Maedhros and Maglor, but had parted from them because he was “wearied of the chase”. According to this story, that was the official explanation given out for his abrupt departure but what in fact had happened was that he had a conversation with Maedhros that first surprised, and then upset him...
The “eminently unsuitable” person of the title is Fingon, of course, but as the story is told from Finrod’s point of view, this is not explicitly stated anywhere.
This story has been nominated for the MEFAs 2010 by Hallbera. Thank you very much!