Gaston is pompous and dim-witted and will do whatever it takes to win Belle's hand. Gaston has all the confidence in the world but lacks the humility to balance it. Finding a strong singer and actor is more important than physical size and stature for this role. He has to be able to sell his big eponymous number with gusto and arrogance as well as lead the Villagers in "The Mob Song." Biceps can be added to the costume, but the bravura needs to come from within.