In Miniguns: Assault we had commanders that lead your army into battle. They all had unique stats and backstories and appeared as portraits. Here's a batch of them. I did most of the UI in the game and wrote all of their backstories so I've stared at these mugs a little more than I'd like to admit, hehe.
I'll list their names and who did what art-wise on each.
Gretchen Bixby - Concept/Paints
Yoru - Concept/Paints
Maddox - Concept/Paints
Hope ya dig!
Artists on Miniguns: Assault