Jaws: the perfect summer movie
An excellent point. I don't mean to deride Scheider as an actor. He was excellent at what he did, but for the most part, he was typecast as the same character in every other movie I've seen with him (of course, Boris Karloff called being typed a blessing, so there you are). That's all I was saying, but Scheider was a great actor.
Meanwhile, Shaw, while he certainly had expressions and "tells" that he used in many of his films (like pretty much every actor), varied his characterizations more over his career. Compare his characters from Jaws to The Sting to Robin and Marion to From Russia with Love to Force 10 From Navarone (a film he didn't like at all). He made a choice early on not to play the leading man because he thought that was much too boring. Villains and character parts were far more interesting to him. Plus, he was a Shakespearean and even wrote a stage play that was a hit both on The West End and Broadway.