Thanos (Earth-1600)

"I have mangled the minds of millions! I have attempted four raging tides of tears! I have reduced the richest of republics to rubble and ruin! I am Thanos! Conqueror of worlds! You will not dare appose ME!!"

- Thanos

Thanos is the leader of the Chitauri as well as the wielder of the Infinity Gauntlet.

History
Thanos was born to A'Lars, the progenitor of the mutant Eternals on Titan, and Sui-San, the last survivor of the original Eternal settlement on Titan. Born with grey, hide-like skin and a massive body due to being born with the Deviant gene, Thanos was a morose child who became obsessed with the concept of death.