Galactus

Galactus is the sole survivor of the sixth incarnation of the Multiverse. Originally Galactus was a humanoid named Galan, born in the previous incarnation of Earth-616 on the planet Taa, a paradise-like world whose civilization is said to have been the most advanced of any of the known universe of that time. However, the Sixth Infinity and all its universes were in their final stages of collapse due to the multiversal renewal cycle.

Planet Hulk
He appear in a flashback.

Infinity Gauntlet
Galactus and other space gods arrive to deafet Thanos. But He was deafet by Thanos. When Nebula took the Infinity Gauntlet, Galactus try to deafet her.

Note: Noah Sterling the narrator says Nebula deafet them We dont no if he means is death...