I'd have gone for fforde alone - but (as Lil says, and as you found) the BFS is overly fond of horror, and has always been more of a pro than a fan con. As long ago as the 70s sidhe_woman and I made valliant attempts to drag in some 'light fantasy' but failed miserably (that was seen as a job for the Tolkien Society, with which the BFS had a love/hate relationship).

I keep hoping that the young blood being brought in through kids fantasy might re-create a British fantasy revival. Give it another 20 years...