These are great choices. For train driving, you can't beat Jimmie Rodgers, who actually worked as a brakeman (and whom my formerly-farm-boy father listened to on the radio in the 1920's).

For mill work chronicles, check out the Dixon Brothers (with a Jimmie Rodgers-style yodel). They lived what they sang about. https://youtu.be/uggT6J-xWjQ

Suggestions: Two entire Kinks albums (Arthur and Muswell Hillbillies) celebrate the working class.

This Kinks classic celebrates the out-of-work class: https://youtu.be/VMKTyKWjMJQ