King Crimson - Excellent!
Yes - No, they suck.
Genesis - Painfully bad self-absorbed navel gazing until Phil Collins took over. Then they were very good.
Emerson, Lake & Palmer - Some very good studio work but their excesses in live appearances such as touring with a whole symphony orchestra in tow provided a call to arms for a punk rock rebellion. So then maybe they should get some credit for punk rock as well.
Jethro Tull - Fabulous!
Pink Floyd - Excellent!