The Gnostics were essentially a mystery school, but they are often framed as a heresy of Christianity led by St. Thomas. They taught that the material world was fundamentally flawed and created by a deity (not God) that they referred to as the Demiurge. They posited that salvation is achieved through Gnosis and that would allow one's soul to escape this flawed realm and enter the divine realm. The moves The Matrix and The Truman Show are very heavily influenced by Gnosticism.

Theosophists brought reincarnation and karma into the fold, but were also essentially a mystery school. Helena Blavatsky is probably the most famous person related to the Theosophy movement, and she was also rumored to be an intelligence asset.

I haven't done much research into the relationship between Alice Baily and J. Krishnamurti, but they are both a part of the same Luciferian new-age movement, and were members of Masonic secret societies, which date back to antiquity (in the forms of different mystery schools / orders / socities / etc...)

Without going too deep down the rabbit hole - yes I believe both of these people were Luciferians and while they do I believe speak some truth, ultimately I believe they are attempting to steer people down the wrong path. You clearly have some discernment based on your question, and I think that's the most important quality a person can possess and hone on their spiritual journey. If you'd like to chat more, or if you have any questions regarding my reply, please feel free to email me at fragworks@proton.me

I would agree with you. I think people are searching for something and attempt to find it in all sorts of forms. The truth is, nothing was missing all-along it just takes some self-realization / actualization to realize that, and that takes time and lived experience. In the West, with all of the materialism that is shoved down our throats from a young age, we very much grow up disconnected from ourselves.