One of the more intriguing characters from Timely's short-lived, but legendary title, Daring Mystery Comics, The Challenger was a master of all weapons and fighting styles, and proved it in every story. According to Wikipedia:

"Former law student William "Bill" Waring, having traveled around the world to learn skills needed to avenge his father's murder for turning state's evidence over to the district attorney, dons a green costume with a full face mask to became the World War II superhero the Challenger."

"Through unexplained circumstances, the Challenger "bounced forward" in time to the present day, finding himself without assets, having been presumed dead, and inquiring of the law firm Goodman, Lieber, Kurtzberg & Holliway about reversing his will. "

"The firm put him in contact with the superhero Captain America, who had found himself in a future era due to suspended animation for advice and assistance.He later becomes part of the federal government's Fifty State Initiative of superhero teams, joining the Montana group, Freedom Force."

"Challenger is a master of weapons, jiu-jitsu, chemistry, and swordsmanship. He is also a skilled marksman, boxer, and pilot."