I can't imagine Adonis coughing/wheezing (but that would be a hilarious twist XD) I'd like to imagine his voice having that rough edge, hinting at vocal cord damage, but it gives off a seasoned vibe instead of sounding sickly (hopefully that makes sense LOL.)
As for Rosario, he has a gift for adjusting his voice to match the moment, because he aims to connect with others and meet their emotional needs (he wants to love and be loved.)