I have been watching this on Netflix really been enjoying it, don’t be put off that it looks like a kids show.
“Trollhunters: Tales of Arcadia is an American computer-animated fantasy television series created for Netflix by Guillermo del Toro and produced by DreamWorks Animation and Double Dare You Productions. It follows the story of James Lake Jr., a teenage boy who finds a mysterious amulet and stumbles across a secret realm inhabited by trolls and other magical creatures. Soon afterward, he and his friends are charged with protecting our world from the dangerous monsters that lurk in the shadows of their small suburban town.”
If you want to go old school give Gargoyles a try: