“Surprisingly, until now there has never been an empirical study of ‘creepiness’ “
This situation was rectified by Professor Francis T. McAndrew and Sara S. Koehnke of the Department of Psychology, Knox College, Galesburg, US, in a 2016 paper for the journal New Ideas in Psychology. The team stopped short of giving an exact definition of ‘creepiness’ – nevertheless, they were able to generate a list of the perceived ‘creepiness’ ratings for various professions : 
See: ‘On the nature of creepiness’ New Ideas in Psychology 43 (2016) 10 -15
Bonus Assignment [optional] Are there any more ‘creepy’ professions that could be added to the table – if so, where would they appear in the list?