First Second Books' Vampire Month is over, but we are still going!
Here is a pair of vampires - and there are some MAJOR spoilers involved here if you haven't read/watched 30 Days of Night, so watch out!
Eben and Stella Olemaun
Eben Olemaun is the star of the original series, 30 Days of Night, which is based around the concept that a group of villainous vampires have decided to terrorize a small Alaskan town called Barrow during the point of the year where there is no sun for a month.
In the end, to save the town (and his wife, Stella), Eben infuses himself with vampire blood - turning himself into a vampire with some degree of control over himself. He then saves the town, and after doing so, lets himself be killed by the first sun in the town in a month.
In the sequel, Stella takes the lead - as the head of a group of vampire hunters.
During her hunt, she learns that there may be a way to bring Eben back from the dead.
She eventually resurrects Eben - however, there is a twist - he comes back AS a vampire! He then bites Stella, turning her, as well.
The pair continue operating as a vampire couple, only as good guys, and actually help save their former town of Barrow from a return attack.