One of the finest western and military comic book artists of all-time, John Severin, passed away Sunday at the age of 90.

RIP, John. Our condolences to his family.

Severin and his sister, Marie, were longstanding artists for Marvel Comics, drawing a variety of projects. He worked for many other companies, though, including Warren, Charlton and DC.

Severin is most well-respected for his work on military comics (here is a sample of his work from Warren's Blazing Combat)...

and western comics (here is a sample of his work from the Two-Gun Kid)...

Severin was also a masterful humor artist, working extensively for Cracked and Mad. Here is him doing a parody of Shane from the pages of Mad...

One of his most amazing skills was his work with faces, both expressions on original characters (how strikingly powerful is just the work on the EYES in the Blazing Combat piece!!) and in drawing likenesses of famous people for humor parodies.

Severin was also a well-respected inker, and his powerful inks are what most superhero comic book fans recognize him from. Here he is inking Herb Trimpe on the Incredible Hulk...

And here he is finishing Jack Kirby's layouts on Nick Fury, Agent of SHIELD in Strange Tales...

He continued working in comics until just last year. His career is nearly unparalleled in its length and continued high level of skill. Here is a page from his Witchfinder mini-series last year for Dark Horse...

Amazing work for a man nearly 90 years old at the time. As our pal Dan Bailey says in the comments, he somehow managed to never lose it. He was just as good in 2011 as he was in 1961. Stunning.