Johnny Cash, Elvis Presley, Mike Ness, Charile Daniels Band, Hank Williams Sr, The Carter Family
Sex Pistols, Rancid, Kmfdm, The sisters of Mercy, Nick Cave, Black Flag, Rollins Band, Audio Bully's, Gary Numan, Pretty much anything pop from he 80's, Punk in general, oh..yeah Social Distortion.
Everything listed above. The influence never stops growing. I do tend to try away from the radio bands from this era though.