Yes, Paul Ryan is being attacked by right-wing news outlets as being too liberal to be speaker of the house. You can not make this stuff up. The crazies are in control! http://www.nytimes.com/2015/10/13/us/politics/latest-unease-on-right-ryan-is-too-far-left.html?_r=0
I think Thomas Hobbes would be a good candidate, but he supported the monarchy, which would obviously make him a Repuiblican-In-Name-Only.