I really enjoy making OOB and TO&E organigrams. I have almost 100 I've made on my Wikimedia Commons page. I use a variety of sources to make them. If you have a unit, organization or battle you'd like worked up just comment or message me.
I can't add the link to my commons page because I haven't met the post count but you can look me up on Wikimedia Commons User: Dmanrock29 I'm also willing to customize these (within reason).
Don't mind the older ones, I was just starting out. I like to think my technique has improved.