Huckabee, Rubio, and Carson all do not believe in evolution. They all want Christianity and "Intelligent Design" brought to public schools, and along with Fiorina and Cruz and Santorum, all made a top priority of banning abortion in any form. Trump even spoke of punishing women. Many of them advocated for monitoring, tracking, banning, and/or bombing Muslims.
Ironically, Jeb Bush would've been a moderate pick. Christie was a moderate before he ran, but then he pulled a Romney and started shouting right-wing ideas. Kasich is a nobody who only had a chance because he was surrounded by nuts. There was Bobby Jindal as well, but I'm not sure where he stood.
But again, you're only proving my point - the few reasonable, moderate candidates got zero votes. Just like John Huntsman did previously, the party no longer gets votes for moderates.
Edit: I forgot about Rand Paul. Like Christie, he was one thing before he ran (in this case a Libertarian), but became another thing (a warmonger) in order to get votes in the primary.