I could hog this post. I like to run mixes of diesels or anything I have. I have done it nearly every session. Usually most are modern models. I'll throw a steamer with some diesels for fun too.
Here's one (modern ) outside that is my favorite to watch.
here's another modern mix with a mid-engine helper diesel:
I really didn't fully notice until now that my consists don't have the same era engines as your post. There are many models I have skipped over. I never bought any RS units for example. They don't appeal to me. I did start purchasing many mid-era engines to fill in the missing years of my collection. There are some F unit sets that I run on their own without mixing into other consists.
