Garo: Carved Seal of Flames
 

With Funimation picking up the Garo anime spin-off (along with a simulcast) might as well start a thread

basically Gothic style Knights/priests vs Demons set in the Valiante Kingdom in Spain during the Spanish Inquistion. After the king launches a witch hunt that endangers both Makai Knights and Makai Priests, a Makai Priestess who is condemned to burn at the stake gives birth to a son, Leon Luis, whose Makai Knight father takes the child away to safety and trains him to become the Golden Knight Garo. Later in his life, when the king of the land grows ill and the throne is usurped by his advisor, the king's son Prince Alfonso and his mother the queen seek out the assistance of Garo to reclaim the throne

series takes place hundreds of years prior to the first series, so it is very stand along if you don't want to watch the toku

if you do want to watch it, here are the shows