You'll probably get some messages off of here, but if you want an overview of all of the people Marketo says are thoughtful consultants >
http://launchpoint.marketo.com/services There are a great number of Marketo Champions who have left their companies and gone out to do consulting careers solo. They all know CRM + Marketo and are all really smart. If I had to pick I'd go after one of them first. From there I know the Yesler folks are doing interesting work.