I'd also add that Solo's hair looks a little too curly. In fact, darken the skin and add a mustache and he would look like Lando from the end of Empire.
There are some aspects of this image which are deliberate homages to 1970's manga, which sometimes lead me off-model. It's not meant to be a literal representation of those characters.
Any particular reason why their names are reversed from their position in the image?
Yes, it's what Hollywood always does on movie posters.
Thank you, everyone!