Gandalf would also be a crucial character. His wisdom and magic could either be a threat or an asset to Vlad. If Vlad is seen as a potential danger, Gandalf would try to keep him in check. But if Vlad decides to side with the good, Gandalf could use his knowledge to help Vlad better understand Middle - earth and its ways. Another main character could be Legolas. His archery skills and elven grace would add an interesting dynamic to the group, especially when dealing with Vlad's otherworldly powers.
Another interesting concept is that Vlad is a lost hero from a far - off land who arrives in Middle - earth. He could use his skills in combat and his knowledge of dark magic to help the Fellowship. For example, he might be able to use his vampiric speed to quickly scout areas or use his charm abilities to deceive the enemy. He could also have a complex relationship with Aragorn, either as a rival or an unexpected ally.
In this crossover fanfiction, Dracula might be a lord in Middle - earth. He rules over a land that is feared by all, but he is intrigued by the power of the One Ring. He sends his minions to find it, but they cross paths with Frodo and his companions. This leads to a series of battles and negotiations. Dracula could be tempted by the power of the Ring, but also realizes that it could bring about his own downfall if he were to claim it.
In fanfiction, Hermione could find herself in a situation where she has to deal with the One Ring. Given her strong will, she might be able to resist its power for a longer time than most. However, she would also be aware of the danger it poses and try to find a way to destroy it, perhaps using a combination of her magic and the knowledge of the lore in Middle - earth.
One common theme is the clash of different cultures. For example, when Middle - earth characters meet those from other fictional worlds, there are often misunderstandings at first due to different values and ways of life.
Perhaps the One Ring could have an unexpected reaction to Naruto's chakra. It could either be attracted to it or repelled. This could create an interesting plot where Naruto has to deal with the power of the Ring while also trying to find a way back to his own world.
A really cool 'Lord of the Rings' crossover fanfiction is when it crosses with the DC Universe. Superman or Wonder Woman in Middle - earth would be quite a sight. They could use their powers to fight the forces of Sauron. This kind of crossover often explores how the extraordinary powers from the DC side would impact the more medieval - style world of 'Lord of the Rings'.
A crossover with the Star Wars universe would also be cool. The Jedi could be like the wizards in Middle - earth. Maybe Aragorn could learn some lightsaber skills from the Jedi and use them against the orcs. And the Force could have an interesting interaction with the magic in Middle - earth.
One idea could be a vampire character who is drawn to the power of the One Ring. Maybe this vampire, being a creature of the night and often associated with darkness and power -hunger, sees the ring as a means to gain ultimate power in Middle - earth. For characters, you could have a half - vampire, half - elf who struggles with their dual nature while being caught in the events related to the ring.
To write a good vampire Lord of the Rings crossover fanfiction, you need to focus on character development. If you're introducing a vampire lord, make him a complex character. Give him motives that are more than just 'I want to rule the world'. Maybe he has a tragic past that led him to his current state. Also, make sure the language you use fits the tone of both worlds. The Lord of the Rings has a very specific, almost archaic style of speaking in places, and your vampire characters should also have a voice that is consistent with their nature. And don't forget about the pacing. You don't want to rush the story, especially when it comes to the big moments like battles or revelations about the ring.