Heimskr

Heimskr is a Talos-worshipping priest in Whiterun.

Before the Battle of Whiterun
Before the Battle of Whiterun Heimskr stood in front of the Statue of Talos and constantly worshipped him, attempting to convince others to do the same. Eventually the Dragonborn broke into his house to steal an Amulet of Mara he confiscated from him, which angered Heimskr and caused him to attack the Dragonborn. After that Heimskr had a very negative opinion of him.

After the Battle of Whiterun and First Death
After the Battle of Whiterun Heimskr was jailed in the Dragonsreach Prison for a number of months before being broken out by the Dragonborn and Nazeem. Heimskr held his grudge towards the Dragonborn and decided to curse Nazeem into splitting into clones after death. This angered the Dragonborn, making him decapitate Heimskr with the Mace of Molag Bal, sending him to the Soul Cairn. The Dragonborn then preserved his corpse and made him into a thrall (nicknamed Heimthrall) and repeatedly killed and resurrected him (as Heimthrall). Eventually he was killed by Harkon and turned into ash when fighting the Dragonborn. This presumably sent him to Sovngarde (or somewhere else in Aetherius).

Resurrection
Eventually the Dragonborn was given the opportunity to resurrect Heimskr and several other NPCs in Whiterun using the Scrolls of Resurrection. Rather than imprisoning Heimskr or setting him free he had him join his high council in Blackreach. After a while he got sick of Heimskr‘s rudeness towards him and sent him to the Highreach Prison for about a week, freeing him in Whiterun after his release. His whereabouts are currently unknown, but he is most likely either laying low, living in his house in Whiterun, or is living in the Dragonsreach Dungeons.