Patrick Stewart was trained as a Shakespearean actor, and he brought that gravitas to all his roles, along with a playful sense of purpose. He was knighted in 2010. Jack Taylor/Getty Images hide caption

Jack Taylor/Getty Images

Patrick Stewart was trained as a Shakespearean actor, and he brought that gravitas to all his roles, along with a playful sense of purpose. He was knighted in 2010.

Jack Taylor/Getty Images

Sir Patrick Stewart's most famous characters tackled concepts such as honor, morality and courage. He played Professor X in the X-Men franchise and Jean-Luc Picard, captain of the starship USS Enterprise, on the show St ar Trek: The Next Generation and its later spinoff, Picard .

Stewart died Wednesday at 86.…