EDIT: Just realized the title said benzo, not anxiety medication in general. Ignore the message if you want, sorry mate.
For me, klonopin is a GOD send. It is the only drug that has made me feel completely normal. But, everyones different. Xanax could also work but that has very similar effects as klonopin. If you want something that doesn't make you feel tired, you could try a beta blocker like atenolol. What I have found the works with the least side effects (besides anxiety relief) is Hydroxyzine (most people know it as atterax.) It slows down my heart rate and my anxious tapping, fast heart rate, sweating etc. Ask your doc to start at a low dose of something like 25 mg, then if that does not work up the dosage. I know anxiety sucks my friend, and those 2 aren't the only solutions out there, they're just the ones that I have found works. You could also try clonodeine but I found that to make me slightly dizzy and harder to focus on things. Everyone's different. anyways, good luck friend I hope you find the relief you are looking for.