Thanos

INFINITY WAR SPOILERS
Born on Titan, Thanks is the last survivor of the Titan population. Thanos's goal is to gather all of the Infinity Stones. When he succeeds his task, he snaps his fingers and half of the universe disintegrates. In the comics, Adam Worlock grabs hold of the Infinity Gauntlet and banishes Thanos to a farm.

Dies in the snap:

Bucky Barnes

Black Panther

Star Lord

Mantis

Falcon

Drax

Groot

Doctor Strange

Spider Man

Maria Hill

Random NYC Civillian

Nick Fury

Wakandan Soldiers

Died By Thanos

Loki

Heimdall

Gamora

Vision

Movies
Avengers (2012)

Guardians Of The Galaxy (2014)

Avengers Age Of Ultron (2015)

Avengers : Infinity War (2018)

Avengers 4 (2019)