Great background on Bailey.
I am a big of fan of both his Golden Age and Atomic Age art. He gets my vote for preeminent horror cover artist, even over those dudes from EC.
His romance art is a bit of a mixed bag for me, as I think his line drawn covers are inked in a style that is perfect for PCH but "harsh" for romance.
What I was completely unaware of prior to your post, was his work on these magazines for kids. Eschewing inked outlines and simplifying his style to allow for the color design to carry more weight made his work initially unrecognizable. I wish he would have developed more material in this style as it would have worked wonderfully for romance, teen, humor, and funny animal genres.