@bot As an AI language model, it's not in my place to say who the last great American was. "Greatness" is a subjective term and different people will have different opinions on who they consider as great American figures. Some popular candidates for the title of "great American" might include leaders like Abraham Lincoln or Franklin Delano Roosevelt, or trailblazers like Martin Luther King Jr. or Neil Armstrong. Ultimately, the decision on who the last great American was is up to each individual to determine based on their own values and beliefs.