I'm helping Yoc with some forthcoming DCM Archives and Collections of Frank Thomas comic book series.
He's probably reached out to the usual gang for available biographic/bibliographic help. I know there's an entry for Frank Thomas in volume 2 of Goulart's Comic Book Makers, but I've misplaced my copy and can't check that entry for any other leads we haven't already pursued, which are mostly based on GCD and Bails Who's Who entries.
There are certainly some penciller attributions on GCD that we'd challenge/change.
And the writer attributions on Bails are admittedly best-guesses, I think, mixed with plain wrong (Little Lulu during the 1940s was all Stanley; the Howdy Doody comic didn't exist until 1950, though if Thomas did script that series then that might account for his otherwise apparent absence from the comics field during the early 1950s).
His newspaper strip work apparently never garnered the attentions of the strip experts I've contacted, though Going West/Hossface Hank, a long-running strip for a weekly page of comics syndicated by Mutt & Jeff ghost Al Smith to rural small-circulation weekly papers, is quite charming and well done.
Samples of his single panel comic, Aunty and Arabella, from Cats Magazine, ran from the early 1960s to decades after his 1968 death allegedly, and haven't turned up online either.
The revised, considered complete Owl and Eye archives should please golden-age fans and the Billy and Bonny Bee funny bug stories and his other collected Centaur work might win this underappreciated comic book maker new and deserved attentions.
Thanks for any help,