Lucifer from Supernatural before he was declared as Pure Evil back in 2018.
Let's not forget that Bellroc and Skrael were still out to destroy the universe using Nari and the Genesis Seals, and Usurna still sold AAARRRGGHH!!! as a slave to Gunmar, both of which either happened (in Usurna's case) or were happening (in Bellroc and Skrael's case). Gunmar and Morgana still planned to wipe out mankind and it's debatable whether Morando still sent Zeron Alpha to bomb Sattelite-Nine yet in this new timeline, so the heinous standard is still up there.
Trollhunters: Rise of the Titans has Bellroc and Skrael, who already had Pure Evil potential in Wizards. All the movie did was make them worse.
Hard no, he comes from a shock-value work with no story or message behind it. Honestly, I think he's better off as Inconsistently Heinous.
It is speculated that the Overlord is an Oni, and if that's confirmed sooner or later, then he could end up qualifying as Pure Evil because his moral agency would be confirmed. Mystake is an Oni herself and she chose to be good.
SMG4 has a Pure Evil villain, that being Sir Benedict Cumbersnatch from the spinoff Sunset Paradise.
Patience, my friend. Mordred and Kronos might end up qualifying, but only time will tell.
I don't think it matters that much to me.
Personally, I don't think it's necessary. We already have Symbolic for those categories.
Yes. Any and all redeeming qualities she may have had in the past are flushed down the drain when she begins treating her fellow True Knots horribly, such as depriving them of their steam to turn them into mindless beasts, feeding Lester to the Overlook Hotel after she resurrects it for her plot of revenge, and killing Crow Daddy when he turns against her. The final nail in the coffin, however, is when she works with the Overlook in an attempt to destroy the multiverse because she learns that every incarnation of her has been defeated in every universe.
To be fair, Niles didn't get removed until after his final appearance which shows he genuinely cared for SMG0 and Fred, which was a few months ago.
DOR-15
Along with Bellroc and Skrael. Skrael was actually proposed by another user while I proposed Bellroc.
It'd better not have been Percival.
Who did that?
Bellroc and Skrael definitely keep without a doubt. Andrias is heinous enough but has multiple mitigating factors, and Mills is nowhere near heinous enough. Still trying to decide about Dodgson following the final Camp Cretaceous season, but he sounds like a tentative keeper.
Lotso.
Zhan Tiri.
Fun fact: Soos Ramirez and Bill Cipher are both from the same series and it was the director who voiced both.
I've added the deletion template to his page.