Yes, I have done several diesels as well, not Southern. Here are a couple of photos of completed paint projects. Other project diesels for some friends of mine were a Conrail SD40, UP switcher, Milwaukee Road F3, and a few others. As for steam, I've done a lot of CB&Q, UP, NYC, and PRR.
I enjoy painting and have been at it for 50 plus years. When I modeled in HO, I did a lot of CB&Q, Great Northern, Northern Pacific, Colorado Midland, Virginia & Truckee, and even some special custom paint schemes.