Martin Goodman, the man and the power behind Stan Lee, who hired Lee and directed Stan's editorial direction for over two decades, before Lee began diverging in 1961 into his signature style with Marvel in the early/mid 1960's.




https://en.wikipedia.org/wiki/Martin_Goodman_(publisher)

He was Stan Lee's uncle, and hired Stan Lee to replace Simon and Kirby as the editor at Timely when Simon and Kirby moved to DC in 1942. It was Goodman who (as Lee also tells in ORIGINS OF MARVEL COMICS) during a session of golf, suggested in 1961 that DC's new JUSTICE LEAGUE OF AMERICA title was selling very well, and that Lee should come up with a similar superhero team book for Marvel. Resulting in FANTASTIC FOUR 1 a few months later, in Nov 1961.

Pretty wild, how Goodman started his early adult life as a hobo, then took a job in publishing, and then became an entrepreneur/publisher of pulps and then comics in the 1930's and 1940's.
And apparently had a good instinct for following the trends from the 1930's to 1972 when he largely left publishing.
And his failed effort to re-enter comics with Seaboard/Atlas in 1974-1975, to compete with Marvel, the company he originally founded and then sold in 1968. There was something of a grudge involved in his founding Seaboard/Atlas.

A window into the wider world of publishing that comics were a part of.

Will Eisner was also an entrepreneur in the late 1930's, who straddled the worlds of pulp magazines and the emerging comic book field, who quickly became rich with Eisner/Eiger studios, packaging ready-made complete new comics to pulp magazine publishers who wanted to enter the comics field.
And then, with some risk in 1940, but already wealthy from Eisner/Eiger studios, leaving the safety of that venture to publish THE SPIRIT newspaper syndicated strip and its comics section to major newspapers nationwide.

But Goodman's publishing ranged from pulps to comics to trendy celebrity magazines to men's magazines. He apparently got out of comics when (even though it was on a temporary boost with Silver Age Marvel in 1968) he could see that comics sales and distribution were on a general downward spiral.