Chemist Carl Wilhelm Scheele discovered or identified oxygen, molybdenum, tungsten, barium, hydrogen and chlorine. Isaac Asimov called him "hard-luck Scheele" because Scheele made a number of chemical discoveries before others, but they were generally given the credit. For example, Scheele discovered oxygen. But Joseph Priestley published his findings first.
Scheele might be more well-known if he kept making advances, but he died young because he had the bad habit of smelling and tasting new discoveries!