Possible Clues:

• Activist/poet Angelou
• Comedian Rudolph
• 'S.N.L.' alumna Rudolph
• Memoirist Angelou
• Hawke in "Stranger Things"
• Ancient Central American civilisation which developed a highly accurate calendar system
• 'Still I Rise' writer Angelou
• Some pyramid builders
• *"Sure, why not?!"
• Civilization that built Chichen Itza