Self Discovery Portal
A lot of interesting information here with regard to both Buddhism and Zen Buddhism.

Franklin Merrell-Wolff
A very interesting man. Almost certainly enlightened as his writings are very detailed and unusual. See also his induction and his aphorisms.

Richard Rose
Another interesting person. Worth reading some of his lectures as he’s very good on the discipline side of self-development. He advocates a “retreating from error” approach , meaning retreating from self-deceit. See his list of questions and some of his lectures.