If you do Crowley as a Victorian/Edwardian fop, you'd have something there, even if you had a bit of explaining to do. A woman came to my Mad Scientist party as a steampunk drag king, complete with cravat, and it was truly impressive and sexy, even before her backstory explanation.

(I'm doing full 1940s vintage - hat, gloves, the works - and telling everybody I'm Sadie Thompson.)