Hakamori Majo Bianca
See, that's the kind of wholesome way of looking at these issues which should be encouraged. I was leaning more towards her uncle because I found him a more entertaining character and he was evidently top tier magical shit when he was alive (plus I have a general dislike of beast types and a fondness for the undead), but in terms of who'd actually be better for Bianca it basically has to be Zela. The guy's clearly reformed after his earlier misdemeanours and seems to have her best interests at heart now, where as it's going to take more than a large scythe to remove her uncle's uncompromising, controlling, egotistical personality. That final exchange between them epitomises it pretty well.