Types most likely to join bizarre cults.

[Stansmith]

Depending on the definition, I'd say ISPs, ESP's in the grips of inferior Ni, and maybe some xNFPs.

Immature Ni convinces SPs that they've received some sort of insight or 'message from god', while xNFPs would probably just join a band of neo-hippies on a whim and not think much of it.

 

[RaptorWizard]

NFs (particularly INFJs) and INTJs would be my best guesses, largely comprising people in groups such as the hermetic or rosicrucian alchemists and sages, to name a few.