Out of those, definitely Rush, although I don't think of them as a "classic rock" band because they're still alive and very much kickin'... moreso than any of the other bands in there. Apart from Rush, it's gotta be Uriah Heep.
Out of the list I'd have to say Rush only because I don't know very much about most of them. I love a lot of stuff that's not up there: Kansas, Hendrix, Cream/Clapton. Simon and Garfunkel(le)...I only know of maybe an album's worth of their songs, but I really really like what I've heard so far.