Post an anime involving the undead

Does the afterlife count as 'undead'?

Corpse Princess...

Hellsing intro. It's even got an undead dog (not sure if the dog is actually Alucard).

Zombie-Loan

Sankarea

Trinity Blood has ma cà rồng in it. Not only that but the main character is a crusnik, a vampire who feeds on vampires. His name is Father Able Nightroad.

kore wa zombie desu ka..