Demon's Souls:
Old Hero - Quite a satisfying fight if you ignore the gimmick and fight him upfront
Storm King - An excellent spectacle boss, especially in the remake
Dark Souls:
... I don't actually have one for this game. Maybe Manus? Great fight.
Dark Souls 2:
Executioner's Chariot - Gimmick boss done pretty well
Flexile Sentry - Interesting concept executed decently
Darklurker - Base game's best boss, and a good duo fight
Sinh, the Slumbering Dragon - Better dragon fight than Kalameet imo, even with the flying
Bloodborne:
Blood-Starved Beast - A great fight for its place in the game, with excellent build-up, atmosphere, and sound design
Shadows of Yharnam - A gank fight done right
Laurence, the First Vicar - It has some BS, but I otherwise think it's a fair and thrilling fight
Dark Souls 3:
Yhorm, the Giant - Excellent spectacle, and even more mechanically and emotionally satisfying if you forgo the Storm Ruler and let Siegward do the big damage while you keep aggro
Dragonslayer Armor - Brilliant mechanics and presentation, with even some underrated lore
The Demon Prince - Maybe the single most underrated fight in the Souls games, as I see it as being a top 15 boss in Soulsborne and the best multi-boss. Overshadowed, unfortunately, by the build-up and more unique designs of Friede, Midir, and Gael
Sekiro:
False and True Corrupted Monk - Very unique melee bosses compared to the rest, with great presentation in both cases, but especially the latter
Elden Ring:
Elemer of the Briar - Overshadowed by the more impressive design of some other bosses, his excellent mechanics and pace feel severely overlooked
Regal Ancestor Spirit - Maybe the best example of challenge not being necessary to have fun with a boss
Fire Giant - I can understand the complaints, but I think the somewhat more unique way you have to read his tells, the switching between on and off Torrent, combined with awe-inspiring spectacle and deep lore make for a very good boss
