Bob and Winifred were grade-A nasty sorcerers, back in the day. You know the type: Curse-wielding, village-burning, puppy-kicking... They might've started out gray, but something pushed both over the deep end, way before Bob turned to necromancy.

Really the only thing I differ a little on is Winifred going all the way over along with Hrothbert. I think of her more in the gray range, even to the end. A village would have to be empty (as far as she knew) of regular folk, and full of the bad guys before she purposefully burned it. However.... she did earn some of the fearful gossip, as collateral damage sometimes happened, regrettably. Her pride and prickly temper got her into trouble-- dreams filled with guilt, anger, blood and vengeance causing her to "retire" into rural midwifery (where my fanon has her eventually meeting Hrothbert of Bainbridge).

See? We can differ 'cause I'm totally NOT the canon/fandom/fanon/whathaveyou police! Your view works fine, too. :D