Based on your description of the image, it sounds like it depicts aspects associated with the Radical Republicans. This group played a significant role during the Reconstruction era, advocating for civil rights and the reconstruction of the South after the Civil War. The imagery of men with bags and a bald eagle could symbolize the political and social changes they were advocating for.
The terms "carpetbaggers" and "scalawags" often had negative connotations and generally referred to Northerners who moved South after the war and Southern whites who supported Reconstruction, respectively. However, the image seems to align more closely with the Radical Republicans' themes and symbols.
So, the best answer would be Radical Republicans.