Forget about daughters and white fathers. Blade works better as a loner type of character with just one helper/assistant at a time. (Whistler/Scud/some other guy or gal). It doesn't mean he shouldn't have a cast of recurring characters.
Make him a samurai with vampire powers (he should be able to turn into mist, sprout vampire wings, hypnotize or mesmerize people with his eyes) who kills all sorts of supernatural entities and fends off supernatural threats not just vampires. Write him as a mysterious figure, shrouded in shadows. Always a couple of steps ahead of everyone else, always knowing something others don't know. Appearing and suddenly disappearing on people. He should own a mansion filled with antiques and magical artifacts. Let's say he kills some ancient vampire or evil sorcerer and he takes it from them.