Which type of actor is most likely to be cast for an advertising campaign to sell medicine?

Someone with a healthy and athletic appearance, who gives the sensation of vigor and energy, who has good posture and good diction and who seems nice and happy.

because of all the immigration, america became one big melting pot. the diversity of cultures from all over the world made america somewhat divided as well. people that immigrated stayed with their kind, and their traditions, while native born americans stayed with their kind and their traditions. normally, people born in american scorned the immigrants as well. the new religions also divided america. in summary, it took away from the american culture and identified america as the "melting pot."