Mark Levin suggested several times Scott Walker!
Scott Walker - yeah!
Constitutional type Scholars say that the Speaker does not need to be a member and this theory hasn't been tested.
Another name floated is Steve Forbes.
A part of me just for giggles would love to see that as everytime he mentions scrapping the code and going to a Flat Tax as it would raise the blood pressure of every leftist loon we could think of :-)....