He's great at blowing things up without messing up his tie
I know this is a very niche concept, but I kinda wanna see all the characters here that are essentially Bill Cipher-esque, with a particular combination of villainy/chaos and style.
Extra points if your characters have a dapper style.
I had to pick this dude when you used bill as Example lol. But for my actual answer Rain<3
Rain is the conductor of a ghost train. The main people that ride the train are "monsters" and such. Humanoids that can hide among humans use the train a lot to travle between human cities and "monster" settlements and whatnot. He is kinda an annoying boss but his employees get used to it. (his bio is old but it has a bit of evil /manipulating vibes if I remember correctly😅)