Newt, who's not "running" officially, is the only conservative in the bunch you mentioned. (there's a bunch on this forum that don't want Newt, but they have NO real conservative alternative)
Part of me thinks Newt COULD actually pull off a win. But it would take a UNITED GOP (what a concept!) and a serious "here's what I'm about" campaign.
Newt does have a knack for getting people to listen to him. I've heard MULTIPLE sources say he'll give a speech and after it's over, liberals in the audience will admit in shock and awe that they agreed with everything he said.
I would call Hunter a conservative as well!