Billboard revealed its all-genre Top 100 Artists of 2020—and the country music industry is represented with more than a dozen artists/acts. Luke Combs (No. 13), Morgan Wallen (No. 24), Kane Brown (No. 31), Maren Morris (No. 34) and Gabby Barret (No. 43) tallied Top 50 rankings. The list ranks the best-performing overall acts of the…