Almost all the action anime adapt the magical powers trope, and the hit Castlevania is no exception. Its world is filled with terrifying monsters, vampires, and a lot of bloodsheds. It attracts a very specific audience, which can be credited for its success.
The main antagonist of Castlevania is Dracula, the king of all vampires. Although Dracula got staked, it was of his own free will. He was undefeated to the end. He knew science and was extremely tough with resistance to almost every attack. Even so, when compared to stronger anime characters, Dracula is not all-powerful. Similarly, there are many he can defeat without any effort.
10 Can Defeat: Shiro Emiya (Fate Series)
Shiro Emiya is the main character of several Fate anime and visual novels. At first, he was not aware of the true extent of his ability and only used it to repair electronics with them. Later on, he honed it to perfection and was able to create a replica of any weapon.
Other than that, he's nothing special. Dracula can easily counter him, as a sword can barely put a scratch on him. Dracula is the worst enemy Emiya could face. He can control weapons without touching them, just like Emiya.
9 Can't: Saitama (One Punch Man)
This is an obvious one, Saitama is shown to possess god-like strength. He has no flashy abilities or magical powers. All he does is land a simple punch on his opponent. And that's it. He got serious twice, and both times, his enemies got blown away to bits.
Dracula can use magic against him. But it won't hold him off for longer. And if somehow Saitama is pushed to his limits, he would use tons of serious punches with kicks. Dracula's endurance would be useless.
8 Can Defeat: King Bradley (Fullmetal Alchemist: Brotherhood)
King Bradley was an example of a great villain. He had some depth to his character and valid points for choosing evil. It took many lives and a great effort to put an end to him.
In a one-on-one fight, King Bradley is supposed to be defeated by Dracula. But not after sustaining some serious damage. He is observant and would figure out Dracula's weakness. Dracula would have to give his 100% to take him down.
7 Can't Defeat: Beerus (Dragon Ball: Super)
The power of Lord Beerus ascends from the level of a normal human being. He destroys planets when he's bored and the fate of Earth depends on his mood. The most Dracula can do is move his castle around or turn the moon red.
Goku and Vegeta were the only ones who pushed Beerus to use his actual power. God knows what would happen if he gets serious. Beerus can wipe Dracula out of existence in an instant.
6 Can Defeat: Levi (Attack On Titan)
As far as it comes to killing titans and humans, Levi is an expert in both. A normal human, without any magic, is easy for him to defeat. The same is the case with titans. He's as skilled as it gets.
But in a crossover, where they are both pitted against each other, Levi does not stand a chance. Dracula is a superhuman with unnatural abilities while Levi is just a normal person. The difference in their power level is too wide. If Dracula was just a tall person, then the tables would turn.
5 Can't Defeat: Sasuke (Naruto/Boruto)
Sasuke was a member of the Uchiha clan, he was already ahead of others. Then, after a lot of suffering and hardships, he acquired a special Rinnegan and Eternal Mangekyou Sharingan, granting him the powers of both eyes.
Taking into consideration his vast battle experience and combat skills, Sasuke can defeat Dracula. His Susanoo, Chidori, Amaterasu, and several other weapons can instantly end Dracula's life. Also, he can cast genjutsu, it would be match over without Dracula realizing it.
4 Can Defeat: Bakugo (My Hero Academia)
Bakugo has a really cool quirk to create blasts from his palms. One blast is of the same level as a grenade and his Grenadier Bracers can do the same damage as a small missile. Bakugo is a hothead and a master planner, he comes up with a strategy in a span of a fight.
Unfortunately, fire cannot damage Dracula. As Sypha tried to scorch his face and he just stood up and punched her. If somehow, Bakugo finds out about Dracula's melting point and creates a large enough blast to reach that temperature, then he may have a chance. As of now, he's good as dead.
3 Can't Defeat: Dio (Jojo's Bizarre Adventures)
Dio would be a formidable foe for Dracula. Both are vampires and extremely strong. Their abilities are also very similar. But Dio takes the upper hand as his version of the abilities is far greater than Dracula's.
Dracula is also immortal, but he can be killed. He would come back in 100 years. Dio can stop time and "Muda Muda" Dracula at the spot. Jotaro found out about his secret after two sacrifices. Dracula can never manage that.
2 Can Defeat: Sora (No Game No Life)
Sora is a genius when it comes to negotiation and mind games. He owns every game he plays. From chess to video games, Sora figures out his opponent's weakness. But that all took place in the world of No Game No Life.
Against Dracula, he would have no bargaining chip. Dracula is a guy of action. He would not play tick, tack, toe, or chess with him. He would face him off in battle. Sora is nothing more than a skinny high school kid, he does not stand a chance.
1 Can't Defeat: Alucard (Hellsing Ultimate)
Again, it a vampire vs vampire. As expected, their abilities match. Dracula is immortal, so is Alucard. Although, Alucard is from the modern world, where he has access to modern technology. While Dracula is from medieval times. It would affect.
And Alucard cannot be killed- if the need arises and he lets himself lose. There is no going back. He becomes a mindless maniac, hungry to consume his opponent. Dracula would just make him stronger.