Kirby had a tumultuous history with both publishers, never quite getting the credit he deserved (which is the case for many comic book writers and artists), but he’s ultimately been recognized for his work.
Cosmic fantasy was his specialty, and he was not simple or subtle in his approach, as he can see below.
For those who may not know, Jack Kirby was a comic book artist responsible for drawing and co-creating some of the most iconic superheroes, especially on the Marvel side.
He had a hand in creating Thor, the Fantastic Four, Iron Man, and the X-Men, as well as Darkseid and the New Gods over at DC.