1. Saitama from One-Punch Man
2. Zeref from Fairy Tail
Zeref is the darkest wizard to walk in the realm of Fairy Tail. Everyone knows this character, as references are consistently made about him. A 400 year old wizard that has created countless demons, and has the complete power of death, with the ability to kill anything around him with a burst of power.
3. Alucard from Hellsing and Hellsing Ultimate
4. Zeno the Omni-King from Dragon Ball Z
I hope you enjoyed this, and to see the complete backgrounds and the 5 characters listed here, I ask that you check the source information yourself, and I hope you had as much fun reading this as I had writing it. (Note that these are my top 5 picks, and yours may vary!)