Organist
A grim organist appears in the ballroom scene, constantly playing a large pipe organ while skull-like banshees spill out of the pipes. In Disneyland's Mansion, the organ he plays is actually a prop used in 20,000 Leagues Under the Sea. On the ride's soundtrack, his manic organ playing (of Grim Grinning Ghosts) is performed by William Sabransky, based on original improvisations by Gaylord Carter.
In the video game, the organist is one of the main "friendly ghosts," and is depicted without a top hat. He is often short-tempered and rude, but appreciates Zeke's efforts to restore the Mansion. His death certificate says that he put his music before his life, and this apparently led to his death.
Though the character from the attraction isn't seen in the 2003 film, there is an homage to him in one scene where Ezra (Wallace Shawn) serves as wedding organist and plays an off-key rendition of Here Comes the Bride. The organist from the attraction was featured in Rick Baker's character concept art for the film, in which he was depicted wearing dark glasses and smiling a ghastly, toothy grin.
The organist was named Sam in the Play It Again, Sam model kit released by MPC in the 1970s as part of their Haunted Mansion series. In the assembled diorama, when Sam pounds the keys, a mummy pops out of the pipe organ.
Read more about this topic: List Of Haunted Mansion Characters