Like the title says, I'm looking for a really good story that has a vampire MC. I want it to be important to the plot though, and not just something that gets mentioned a couple times and then everybody completely forgets about it after a few chapters.
The first thing I can think of is Noblesse. Ever since I have seen Noblesse the world of vampires isn't the same for me anymore. It's noblesse all the way rai-sama Orange Marmalade is cute too with female mc and romance huehuehue but only the manwha, dunno about lightnovel or webnovel
Kyuuketsu Hime wa Barairo no Yume o Miru Tensei Shitara Kyuuketsuki-san Datta Ken These have vampire as one of permanent supporting character which are not forgotten in story: Divine Protection of Many Gods Boundary Labyrinth and the Foreign Magician
The Spearmaster and the Black Cat Well it is her main feature, and she uses it to revive people. So it is pretty significant.
i don't know about vampire mc webnovels, however i can recommend a few regular novels trilogies and series: 1)vampire of the mists by christie golden followed by I Strahd (old d&d/ravenloft books that i enjoyed when they came out) 2) the assasini trilogy by Jon Courtenay Grimwood is more of a European medieval setting with great attention to details 3) Garon Whited's Nightlord trilogy mixes up an alternate world and many interesting concepts with major plot twists you just don't see coming 4)anita blake vampire hunter novels by Laurell_K_Hamilton starts as paranormal romance and gets bloody and freaky very quickly while in later books it becomes very graphic and unsuitable for anyone underage (i don't want to post spoilers but this is very nsfw (also a few comics that are sfw), (vampire's are not the MC but are an integral part of the series). you can check them out on goodreads