Which of these men is not a famous watchmaker?

Of the men listed, William Herschel is the individual who is not considered a famous watchmaker. He was a German-born British musician, teacher, and most notably, an astronomer. He made major discoveries and contributions to the field of astronomy. He was the son of a musician and was born in Hanover, Germany, in 1738.

Herschel was one of the first 'professional' astronomers to discover infrared radiation. With help from his sister Caroline, they were able to develop the modern mathematical approach to astronomy. In 1781, he discovered the planet Uranus which was the first planet to be discovered since prehistoric times. In December of 1781, in honor of his most famous discovery, Herschel was elected as Fellow of the Royal Society. He would also became the Court Astronomer by King George III in 1782, and was given an annual grant. These events allowed him to completely focus on astronomy as a career.

In later years, Herschel's skills in telescope building grew and became so well known, that he was able to sell them to a growing list of local and foreign customers, including royalty and dignitaries in Spain, Russia, Austria, Germany, and China. In 1789, he completed a 48-inch telescope, which remained the world's largest for over 50 years. Using this telescope, he discovered Saturn's 6th and 7th moons that same year.

After a notable career in astronomy, William Herschel died in England in August 1822 at the age of 84.