Another option could be Michael Caine. He has that classic British charm and elegance that would be perfect for a butler role. He could bring a sense of humor and warmth to the character, while still being able to handle the more serious and magical aspects of the story.
I think Sir Ian McKellen would be a great choice. He has that air of elegance and mystery about him. His acting skills are top - notch and he could bring a lot of depth to the role of the butler.
Dobby could be a great butler. He was always eager to serve Harry and was very loyal. His knowledge of the Malfoy manor and other wizarding households could be useful. And his unique brand of magic, like his ability to apparate in and out of places where other wizards couldn't, would add an interesting dynamic to the story.
A character like Severus Snape could be an interesting choice. He already has that mysterious and somewhat dark aura about him. Transforming him into a demon butler would add an extra layer of complexity to his character, and his relationship with Harry could be re - imagined in a whole new way.
The butler could be a protector. He might use his skills, like combat skills or knowledge of ninjutsu, to keep Naruto safe from various threats, whether it's rogue ninjas or political schemes.
Maybe the butler has a mysterious past that is somehow connected to Harry's family. This connection could unfold as the story progresses, like the butler was once in the service of Harry's ancestors and now is back to fulfill an old prophecy or oath related to protecting the family heir.
Dobby could be a great character as a butler in fanfiction. He already has a strong loyalty to Harry and his self - sacrificing nature would make him an excellent butler. He could use his house - elf magic to keep Harry's living quarters clean and protected.
I really liked 'A Magical Butler's Adventure'. In this fanfic, Harry somehow ends up in the Black Butler universe and has to navigate through its complex society. It's full of twists and turns as he tries to find a way back home while dealing with the various characters and their motives.
A group of rogue reapers. They don't follow the rules of the Death Gods and are causing chaos in the afterlife and the living world. Their actions start to affect Ciel's plans and he has to deal with them, which is difficult as they have unique powers related to death and time.
Yes, it is based on a true story. It takes inspiration from the real-life experiences of Eugene Allen.
Yes, it was based on real events and real people. But some parts might have been fictionalized for dramatic effect.