Limbaugh
I listen to Limbaugh while I work, and sometimes catch Hannity as well. As conservatives, both are surprisingly moderate compared to the image they get from their critics. Limbaugh calls the conspiracy nuts "Keepers Of Odd Knowledge."
There are certainly loons out there. Michael Savage is usually over the edge, and I haven't heard him in many months. I like Walter Williams, who sometimes guests for Rush, and tends much more toward the libertarian than conservative. Art Bell and George are a secret vice. The loons come from the woodwork out.