Complex sentence: Kenneth More has been described as his "rival" in British cinema at the time, although Gregson tended to appear in less comedy films and more dramas than More, and was less'broad' in his performances.
Split into simpler sentences: Kenneth More has been described as his "rival" in British cinema at the time. John Gregson tended to appear in less comedy films and more drama films than More though, and was less'broad' in his performances.