I do wonder though, if any big name creators were offered books and turned them down for personal/political reasons.
Very good question, and a great opportunity to earn some cool points. These folks, however:
Brian Azzarello — I am indifferent, but will avoid his work in the future.
Lee Bermejo — love his work, unfortunately will have to boycott.
Darwyn Cooke — hated his work in the first place.
J.G. Jones — indifferent, will avoid.
JMS — fully expected him here, generally disliked his many Moore rip-offs already.
Adam Hughes — I generally only save JPG's of his covers, anyway.
Andy and Joe Kubert — no big loss in either one of these.
Len Wein — really? Wow, that's sad.
Jae Lee — last thing I got of his was Sentry. He's good. Sad to have to boycott.
Amanda Conner — indifferent, will boycott.