Wulbren is lowkey the best written and most realistic villain. Yes, Raphael is flashy and Ethel funny, and the three Stooges have their simps, but Wulbren is your everyday villain, who starts out wanting teh right thing (stopping Gortash and retaining right of free speech as he explains at one point to you), but he looses his humanity along the way. If you read his diary in the Underdark, you see a glimpse of the person, he once was.
I also think, that Wulbren is the only villain, that is redeemable.
I'll add you a Kagha. I feel the most terrifying villains are the ones that are the more normal ones, the ones you look at and think that in some twisted reality, you might have ended up just like them. Poor Barcus who holds out hope until the end.
