One Panel #763: Captain Triumph Premieres!

From Captain Triumph: "Introducing Captain Triumph!" by Alfred Andriola, Crack Comics #27 (January 1943)

Though it is derivative of Captain Marvel with its lightning-strike transformations, I still think the mostly-forgotten Captain Triumph was a pretty handsome strip about a hero who fights crime with the ghost of his brother (as you do). Captain Triumph would run into 1949, when Crack Comics became Crack Western and no longer had need of his services.