(Obvious spoilers) What’s your favorite final boss in gaming

For me this question is tricky I have a few Omori from Omori is a amazing fight in the context of the game with it standing out to me. Another one is the Universe from Everhood with it having such a emotional climax and the fucking music. There is also gehrman from bloodborne that fight is just perfection. Maybe even Lucifer from SMT nocturne?