Venus and Serena Williams (sisters). Two professional American tennis players: Venus Williams, a seven-time Grand Slam title winner, and Serena Williams, a seventeen-time Grand Slam title winner. Homeschooled.
Serena and Venus are incredible athletes and impeccable role models for sportsmanship (I can not imagine having to compete with my brother in front of the world - and I'm not sure it would be pretty). Serena has 40 career tennis titles and older sis Venus has 43, and as if winning weren't enough - they look great doing it.