The Blue Collar Comedy Tour (Jeff Foxworthy, Larry the Cable Guy, Bill Engvall, Ron White) plus Jeff Dunham are the usual suspects. Foxworthy and Engvall are good clean comedians for the most part, and I like clean comedy. Ron White has the same style but is definitely not clean. Jeff Dunham has talent, but somehow I don’t really like him. I have no idea what to think of Larry the Cable Guy. It’s all schtick, he’s not actually Republican, southern, or working class, but people take the schtick seriously
Also, any comedian whose schtick is being a working-class white guy from New York, Boston, Chicago, or LA and who is a self-proclaimed dirty or offensive comedian. For example, Bill Burr, Adam Carolla, Doug Stanhope, etc. These guys and their fans definitely are Republican/Libertarian leaning.