Good bands but "Classic Rock"?
I think I've heard nearly all those on Planet Rock, at least six of them are regulars. They usually allow one or two curve balls in a Rock Block, I suspect you are most likely to be chosen if the list is about 50% Planet Rock typical stuff, 30% obscure by artists that will be recognised and 20% 'rockier' music by unexpected artists. Don't forget they ask for more songs than an hour's worth, so they can drop a few.