Who are the easiest people to write biographies on?

People who have led interesting and eventful lives. This could include people who have made significant contributions to their field, people who have overcome great challenges, or people who have simply lived through interesting times.

People who have left behind a lot of written material. This could include diaries, letters, speeches, or other documents that provide insight into their lives and thoughts.

People who are well-known and well-documented. This could include celebrities, politicians, or other public figures who have been extensively written about.

People who are willing to cooperate with the biographer. This could include providing interviews, access to personal papers, or other assistance with the research and writing process.