|This needs a stretch.|
Needed: Physical appearance.
The butler worked for C.L. Magnus.
Insert details here.
His spooky manner made him a suspect to be the Ghost of Redbeard.
Scooby-Doo, Where Are You!
He turned the gang away because Mr. Magnus didn't want to be disturbed. He was tricked into letting them in when Velma Dinkley and Shaggy Rogers disguised themselves as hotel kitchen staff. As his boss spoke with the kids, he creepily spied on them from behind a curtain, scaring Scooby-Doo.
Gold Key Comics adaptation
He turned out to be an undercover insurance agent (who carried a gun).