1. The Allfather from Jotun, a boss i still have yet to beat. Dude summons the other 5 bosses in the game then shoots multiple tracking lances. Also, to fit all the other bosses, his map is massive, so it takes forever just to walk over and hit the dingus. 2. This one i have beaten, i was the Taken Cabal guy from the end of the Malfeasance strike quest. He wasn't very powerful by himself, but the encounter was a little devil. The map was only four tiny rocks, all of which constantly turned, so if you made a bad jump, instant death. Only two of the rocks had cover of any sort, and the boss would periodically spawn 3-4 turrets that floated on the edges. Also, he would spawn ads, and, later in the fight, he would even spawn 1 or 2 wizards. Also its density, so you know he has a ton of health. 3. Vicar Amelia is the furthest boss i've gotten to in Bloodbourne so far, and i've already lost 50,000 echoes to her. Hopefully i'll beat her soon because i don't want to lose anymore echoes.