At least from a mortal perspective, correct?

If one assumes that goodness is the nurturing and defence of personal happiness for all sentient beings and evil is the enabling or infliction of unnecessary or involuntary suffering, than it becomes very easy to place the various Daedric Princes at certain points along the moral spectrum.

Molag Bal, King of [censored], Lord of Domination is at the evil end of the spectrum. As are the likes of Mephala and Boethiah who actively aim to cause pain and anguish for mortals. Whereas Princes like Malacath and Meridia, who tend to stay out of mortals' way and if they do get involved tend to act relatively fairly, could easily be placed towards the good end of the moral spectrum.

I liken the more malevolent Princes to man-eating beasts in our world. Sure, they don't decide to be the way they are, but the suffering they can cause because of their nature is more than notable and should be avoided and suppressed at all costs.

From mortal perspective they definitely aren't in the gray area of morality as majority of mortal find all and every daedra insanely evil, save for a couple of indidivuals, Azura being the most common example of one that appears to be good.