I haven't tried Ashwagahnda, Rhodiola, or Holy Basil. I was on St John's Wort for many years and found it very effective in managing depression, stress and volatile outbursts. My wife could tell which days I hadn't taken it by noting my moods. But it didn't last forever. The packaging of the brand I was using changed the recommended dosage, so I took what the new package recommended (2 tabs instead of 1 a day) and immediately experienced the start of a mixed episode. I stopped taking it abruptly. There was no way to taper down easily and at that stage I knew nothing about tapering. Perhaps that is a drawback with such capsules and unspecified strengths of dosage.

I then saw a psychiatrist who prescribed Prozac. I think he didn't believe me that St John's wort was actually quite powerful. Whatever the effect, I was put into a mixed episode like I had never experienced before or since. So much for herbal = placebo.
edit: to clarify, the major mixed episode was after I started on Prozac.