Between Asylum Demon, Tower Demon, Witches of Hemwick and Genichiro, he probably takes the cake for me.
At first, he’s a huge wall and pretty much impossible to beat for new players. Once you get the hang of the combat, it just clicks (literal shills running down my spine) and you end up appreciating the fight a lot.
What’s your pick?
Commander Honglan in Wuchang: Fallen Feathers is a delight to fight. The internet is full of people complaining that she’s too hard, but my friend beat her in 5 tries with a magic build. I, meanwhile, lost probably over 200 times (at a low estimate) trying to beat her with the starting longsword and the parry skill, and beating her was one of the most satisfying victories I’ve ever had in a soulslike. At no point did she feel unfair to fight, she’s just difficult. The fight felt very tight, fast-paced, and fluid.