Stan is either a rogue or a monk, Mabel is probably a Bard-barian (yes, she made that up by herself, and YES, she has an electric guitar that can transform into a two-handed axe and conjour puppies whenever she rolls a nat20)
I think Bill in both episodes was evil, but on different scales of evil since different things were at stake in said episodes.
In Sock Opera, Bill possessed Dipper in order to destroy the laptop and journal, thus keeping Dipper from finding out about the portal or the author. In Journal 3 (the real life version) we find out Bill later intended to make Dipper jump off the water tower and even asked Mabel to join in. So…yeah, Bill’s role in that episode was evil, but it could’ve been much, much worse had he succeeded.
However, in Weirdmageddon, Bill had finally gained access to reality and got a physical form. He intended to take over the world, then eventually the entire universe. Now, Bill only kept Ford alive because he was the only person who knew the equation to collapse the barrier around Gravity Falls. If Bill had gotten the equation, he would’ve killed Ford and then take over the world. Alex Hirsch stated this in an interview (forgive me I can’t remember which one). A lot of stuff was going down in the finale. Bill had stopped time. Mabel was stuck in Mabel-land. Bill destroyed the journals, so Dipper was (at first) completely helpless. The Cipher Wheel was destroyed as well. In a nutshell, a whole lot of things were at stake, like the lives of the Pines family, and the fabric of time and space.
So in conclusion, I think Bill was more evil in Weirdmageddon than in Sock Opera, but only by a little. Both did (almost) involve the death of a main character, but in Weirdmageddon, the universe was almost taken over and a whole lot of other stuff was hanging in the balance.
What Bill did in Sock Opera was much more personal than what he did in Weirdmageddon, and it was targeted against two characters we know well and care about. It’s hard to make something on the scale of Weirdmageddon feel as deliberately nasty as something close-up and targeted like Sock Opera.
With that said, I’m not sure that weighing and measuring relative evil is a productive thing to do here. Bill Cipher’s a big jerk.
“When the liquor runs low, my friends run low Got nowhere to go Nowhere to go, no religion could ever save my soul Nowhere to go Nowhere to go, and I feel like a hungry dog in the street on a very short leash”