Ali ibn Abi Talib was among the earliest who narrated and taught.

The evidence

1. The chain of transmitters — passage/arbaun-05

   1. person/al-qasim-ibn-muhammad
   2. person/aisha
   3. person/muhammad

   A Forty hadith whose chain runs through the household's kin.

2. chronicle — work/itmam-al-wafa-fi-sirat-al-khulafa

   A paraphrase of Itmam al-Wafa on the caliphs' lives: Ali's standing in narration and judgem'en't, restated faithfully.

3. object — object/naal-al-nabi

   The preserved sandal — a relic tied to the Prophet's household in memory.