I'm thinking of movies like Kingdom of Heaven , or Arn: The Knight Templar where Guy de Lusignan is almost always the 'bad' guy on the 'good' side. From a small amount of looking into it, he just seemed to be politically savvy, which would entail being a dick at times, and he owed a bit of his later success to Sibylla. How accurate is this and his portrayals?
Guy was incompetent, but not evil like he is commonly portrayed.