https://en.wikipedia.org/wiki/Lou_Fine

Lou Fine, one of the earliest great talents in comics, died in 1971, at the age of 56.

From 1939 to 1943, Lou Fine did many breathtaking covers, and series work on The Flame, Doll Man, The Ray, and the Black Condor. Mostly for Quality Comics.






After that, Fine more profitably did ghost work for 3 or 4 years on THE SPIRIT newspaper strip, for Will Eisner. After which he left to do more lucrtive commercial art.

Before I ever knew he did mainstream comics, I'd unknowingly read some comic strip features he did for BOYS LIFE and HIGHLIGHTS magazines.