What roles did Draco, Solon, and Peisistratus play in history of Greek government

Draco was an Ancient Athenian politician who brought first Athenian written laws in 621 BC.

Solon was an Athenian lawmaker who brought first economic and constitutional reforms that led the state towards democracy.

Peisistratus was an Athenian tyrant who overthrew oligarchy and made many improvements that influenced Athenian prosperity and unification.