Best Band From This Bunch?

Going with Yes.

They were really the pioneers of modern Progressive Rock and Steve Howe is one of my favorite guitar players.

Nazareth for me

None of them stand out enough to get a vote for me. I mean some of them I think are ok but just not good enough to validate a vote over some of the other bands.

haven't heard of most of these bands but of the ones I know, I will go with Blue Oyster Cult.

Was a toss up between BOC and Yes, but I went Blue Oyster Cult.