Depends on your mythology.
Strigoi in Slavic mythology are nicely represented by Witcher (though that one is heavily Polish-centric (UNSUPRISINGLY) and westernized). The original story where Geralt first appeared, with noble girl who slept during a day in a coffin and during the night turned into hulking monster with two sets of teeth and whatever is actually based on folk tales from Polish highlands. The monster and even the way she gets defeated is the same.
Strigas in the old stories are not technically undead. They are people who got born with two souls, optionally two hearts and barely noticeable two sets of teeth. Being a newborn with developed teeth was also a sign of being one. Literally all of them were heavily hurt in first life (usually unrequited love, BEING A STRIGOI HERE I COME) because only one soul (usually due to lack of knowledge and also because that's forbidden) was baptised (later beliefs, originally it was proably some pagan ritual of passing) and that brought insanely bad luck on them. Then they died, mostly every early, but the second soul still lived in the now dead body, which is why it raised at night and went off to drink blood and murder shit (it had to so it could keep alive). It should be noted that Strigas most often were not openly malicious to people, being mostly reclusive and sad creatures, but their cursed nature brought bad luck to others too and when it was hungry it could not give a shit about not eating a human.
I could talk for a bit about Slavic (though, more specifically, Polish) demonology and various monsters as I did some research in my time. It should be however noted that whatever I know could be wrong and very much different from what someone knows as really, there is no good monography about it and it still varied heavily from village to village, which is also exactly why whatever singular Slavic pantheon someone tries to shove down your throat is fucking wrong.
But yeah, again, Witcher got a lot of it right.