Was 43-years-old when Jaws (his first iconic score) came out.
At an age when many people think that their hopes and dreams are over and it's time to make way for the next generation, his legend was just beginning. As did the film career of the late Alan Rickman when he landed his very first movie role as Hans Gruber at age 41. Hell, Harrison Ford was nearly 35 when Star Wars was released.
They say that your body's prime is over by age 36. But the best may yet be to come in your life. Truly an inspiring man.