Trying to fill Ford's shoes will come off as cringeworthy regardless of whoever they get who looks and acts like him.
Everyone has their own imagination about Han Solo pre-cantina and it can only end facepalms. I can see Disney making him a smuggler of really nice things for happy multi-cultural people, rather than drugs and other shit he could flip for a buck. He won't fuck bar chicks and will confide in Chewie how he wishes he had a girlfriend to hand his balls to.