I recently reread the American Gothic arc of Alan Moore's Swamp Thing and I realized how more effective it was as a political commentary than so many other "political" comics because the stories can be enjoyed on two levels,: they can be enjoyed as straight forward horror narratives or as allegories for issues such as the effects of slavery, gun violence, nuclear waste, and the patriarchy for which Moore makes his arguments in a very nuanced manner.
There are so many bad examples of comics with political themes, yet people tend to ignore the comics that do it right.
Today I read the Fantagraphics trade paperback of Peter Kuper's World War 3 anthology which I thought was very successful in the points it was attempting to get across to the reader.
Most artists by nature are left wing, so overtly "right wing" comics are far and few between, and frankly most of them are terrible. There are certainly conservative comic book writers such as Chuck Dixon and Mike Baron whose politics seep into their work, but not to the extent of someone like Dennis O'Neil on comics such as Green Lantern/Green Arrow. The only truly "great" right wing comic I can think of is Steve Ditko's Mr. A.