You've really eliminated basically all the meds that would help with anxiety.
There is hydroxyzine, which is an antihistamine that many people say has really good anti-anxiety properties. It's also supposed to be mildly sedative. My experience with it has been disappointing. I never got any true anxiety relief or sedation from it, but then again I've been on alprazolam for anxiety for the past 4 years - so it might be totally different for you.
You could try trazodone. It's an antidepressant that has anxiolytic and strong sedative properties.
There's herbal stuff you could try like Valerian or Kava Kava, which I've tried and again they weren't effective at all.
That's about all I can think of off the top of my head right now, but others might have some ideas.