Who has the most powerful and versatile scream?

Rank as you see fit. Here's mine:

1. Black Bolt

2. Songbird

3. Siryn

4. Banshee

5. Black Canary

I know their are more, but these are of ones that I know. I would have put Banshee above her but she can hypnotically control people.

black bolt, definately

Black Bolt's for power, but Songbird can accomplish so much with hers, due to the solid sound she can make.

Songbird
Siryn
Banshee
Black Bolt
Black Canary

I put Black Bolt above Canary because he can detroy more crap with his voice, and that counts as increased versatility to me.

flash prime

Blackbolt's the most powerful/dangerous.
Songbird's is the most malleable for other purposes.
Banshee's and possibly Siryn's is the most versatile (offensive attack, sleep, mimickry, etc.).

Kylun and Ruckus could be added on the list, though they would not fair well to the majority of the others with exception of sound duplication factors they are superior at (and Ruckus can probably be close in match to Banshee on offensive power).

Black Canary would be on the bottom based on the provided list.