The Silmarillion: Who did it?

Saved Beren's life from Werewolves

Raised Elrond and Elros after Earendil turned into a star and Elwing turned into a bird

Betrayed Turin Turambar to the orcs of Morgoth

Shot Beren in the breast intending to kill Luthien in a rage

Forged the rings of power

Forged the Silmarils, made a horrible oath, killed the Teleri for ships, had seven sons, hated his brother, and left his wife.

Was the only elf known to marry twice

Attempted to save the twins Elured and Elurin from starving in the woods but sadly failed.

Was the Lord of Rivendell, and summoned a council that formed the Fellowship of the Ring

Saved Maedhros from Thangorodrim, and in the process had to amputate Maedhros hand.

Denied Feanor her hair thrice, and gave Gimli the Dward 3 hairs during the Fellowship of the Ring

Wanted to go to war over a handful of gems during the Hobbit, also fathered Legolas Greenleaf.

Served King Thingol and was the leader of the March-Wardens

Betrayed Gondolin to Morgoth

Killed his wife with a javelin by mistake when he meant to kill his son.

Wounded Morgoth in the foot shortly before his death giving Morgoth a hard time walking, and fathered Fingon.

Married Idril and was the father of Earendil.

Tried to keep Beren from marrying his daughter by trying to send him to his doom on an impossible mission to steal a Silmaril.

Stole a Silmaril, killed Finwe, was cast into the void by Earendil, and will ultimately be defeated by Turin Turambar in the Dagor Dagorath