What is the most powerful non benzo drug for sleep?

[Kachamkin]

I was on low dose of seroquel and it was pretty effective.  I stopped taking it because it would make me have this uncomfortable feeling before making me sleep.  But my sister in law swares by it.

I thought it was too hard and didn't give high quality sleep . Did you felt good next morning ?

In the morning you are awake and do not feel any drowsiness. Do not abuse large doses: 25 - 50 mg is quite enough. Seroquel helps to fall asleep 30 to 40 minutes after ingestion, but it cannot be said that it provides a deep restless sleep all the night. And most importantly: no addiction, no withdrawal syndrome.

I know one person who has been on seroquel big miss for them unfortunately did not enjoy the experience..
based on info given here about said perspectives I'd say seroquel is equivalent or comparable in effect to clonidine .
"Clonidine" is a very strong sedative and also blood pressure med as well as panic attacks being they at times lead to high blood pressure
Just my two cents

My experience (for years) is quite acceptable. Yes, of course, you must not forget that seroquel is antipsychotic, not sleeping pills, and  has other uses, but in small doses may be applied. We all are different: what suits one does not suit other.