The others were quite needlessly condescending towards you due your usage of "alpha male", even though you did specify that you are not thinking about PUA stuff. Either way, the very notion of an alpha male for humans is far beyond ridiculous, seeing how our different subcultures desire different characteristics in the leaders, and you can't possibly have them all when they are directly contradictory.
EFT and even more so, NLP are just slightly more usable things like hypnosis due to their abstract nature and unreliability which stems from exaggeration of results. There is no such thing, and will never be a such thing as "inner self" that exists outside of present moment and can be found. It is possible to learn things about yourself, but beyond the abstract notion of "being more in touch with yourself", it has no actual use.
The reason why most books on these topics leave you dissatisfied is that it is all either see-through bullshit that doesn't work, or might work in one out of a hundred cases, or it's the reality, which means that it is slow, boring, and the only results you yield are self-assigned targets.
Ultimately, that is all that is possible, because there are no shortcuts or easy ways of doing these things. If there were, a bit more people would be doing them, and they would be much more well known, don't you think?
There are some books that could be useful for general confidence boosting, the aforementioned books on body language, with the reminder that they describe just the most common cases, and that most of communication is so nuanced that it helps only on the surface level, and the age old "How to Win Friends and Influence People", which is an old book, but if you adjust the ideas for the modern times, it is still a useful bunch of information.