My go to prog rock band would be Dream Theater. But I like those other bands, as well. Surprised Porcupine Tree is all the way down at #49.
On a related note, I believe Geoffe (sp?) Tate was kicked out of Queensryche recently. I haven't really listened to them much in recent years. They were at their peak when they released Operation Mindcrime. Also loved Rage For Order and The Warning.