Ed and Lorraine Warren are best known in the mainstream world as the folks behind the story of The Conjuring and Annabelle. In the paranormal world, they're known for their demonologist and paranormal work. For some, they've got a more notorious connotation behind their name because of their work... Some don't believe that they were very genuine.
Ed passed away in 2006 and Lorraine passed away in 2019. Their Youtube channel is run by their just-as-suspicious son-in-law, Tony Spera. He is the co-director of the New England Society for Psychic Research and was the curator of The Warren's Occult Museum, which is now closed.
He's posted virtual tours of the museum, including a video about the infamous Annabelle doll. Their most popular video on the channel dives into their experience with the haunted doll...
Another notorious case by them was their Amityville investigation. In the early morning on November 13, 1974, Ronald 'Butch' DeFeo Jr murdered six family members in their home in Amityville, Long Island. Soon after, the Lutz family moved in began having paranormal experiences that warranted a visit from Ed and Lorraine.
The family has gotten a lot of negative backlash on many of their cases, but some people still highly regard Ed and Lorraine as popular paranormal investigators.