The Filler Brush Man
I wonder if anyone has ever counted how many individual DC Comics cartoonist Henry Boltinoff appeared in. When I was a kid in the 1950s reading DC he was in every single issue I read. For years he was the filler artist for DC. Boltinoff, who died in 2001, sold me some of his original art years ago. There was an ad in Comics Buyers' Guide from Mr. Boltinoff, three pages for $25! A real bargain. He sent me a couple of full-pagers, and a "Cap's Hobby Shop" entry, all from 1960s comics.
Studying Henry's original artwork showed me he was a meticulous craftsman. Nearly every neatly brushed line is worked over in white paint to make sure it looked as smooth as possible. He probably didn't need to spend that much time on it, but he did. He was a true professional in every sense.
If there's anything else I can say about these examples from my 1940s Batman issues, it's that the gags themselves aren't laugh-out-loud funny, but more like mildly amusing. His work is very appealing, though, and someone thought it was funny because he made many sales of single panel cartoons to prestige publications like Saturday Evening Post. He also did syndicated panels in newspapers for years.