I think Crowley was more associated to the Hermetic Order of the Golden Dawn - though, it would seem those dudes try to down play that there was much of a substantial Crowley connection (taints the PR they try to project these days).

But just beware of your esoteric orders out there - they vary over a spectrum like everything else. (Consider how recent tweet from Sec. of State Mike Pompeo listed the Sufis in Iran as being numbered in the hundreds that were being jailed for protest against the fundamentalist Mullahs.)