No cast members still living?
According to my review of the Full Cast, not one cast member, even a minor one, who had a date of birth listed, did not also have a date of death listed.
There were several minor characters with scant bios and no birth or death dates. I suspect they're passed away also, because most of the cast were oldish, and there were no kids, that I can recall.
http://www.highdefdigest.com/blog/wp-content/uploads/2013/10/house-of-wax-53.4.jpg
The other principals: director, writers, producers, cinematographers, art director, set decorator, makeup, editors, music-by, are also dead.
Maybe that's not too surprising to most, for a 1953 movie, but it's significant to some of us for its special place in our memories.
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The story is king.