Yes. The Jedi Exile was unable to physically defeat him, but eroded his will to the point where he gave up his connection to the Dark Side and died.
Sion Blythe died in 1835.
Sion Hart Rogers died in 1874.
Sion Record Bostick died on 1902-10-15.
Presumably at the hands of her apprentice, Darth Cognus.
Lightning by Darth Sidious.
Darth Revan vanished when he was defeated by an Imperial strike team, but it is not known whether he died.
yes, you can but you might die
Winifred Knights died in 1947.
Episode VIII
Darth Turanus died by Anakin Skywalker when Chancellor Palpatine told, or rather ordered Anakin to kill Turanus.
After defeating Darth Malak, Revan journeyed into unkown space, leaving behind the ones who accompanied him in his quests to find the Star Forge. Darth Revan's death is not known, and he is not spoken of after that.
Darth Vader killed him.