For Roman examples I recommend A Roman Werewolf and a Dinner Tale - Beachcombing's Bizarre History Blog - he covers the story from the Satyricon:
The word for werewolf is versipellis, ‘turn-fur’, and werewolf veterans will notice some familiar traits. The moon is very much in evidence in Petronius’s story.Dr Beachcombing even has a tag devoted to Werewolves!
There is quite a good summary of the Greek and Roman examples of the λυκάνθρωπος on Wikipedia, although as always I recommend double-checking anything there: Werewolf - Wikipedia, the free encyclopedia
Dr Beachcombing also has a tag for witches - here - and one for human sacrifice - here - and ... oh, I'm going to bet if you click on his blog you'll find something fascinating!
Beachcombing's Bizarre History Blog -
For zombies, see Medievalists: What a Bunch of Tools: Zombie Saints and Their Use Within Medieval Communities