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During the time period of the Atlas revival, 1953-1954, Batman was certainly "thriving" in Batman, Detective and World's Finest.
Certainly Batman held his own in the 50's, but I think saying he "thrived" is a little much. There were no new Batman Family titles added in the 50's. In fact you can say one was lost when Robin's solo strip in Star Spangled was dropped.

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Captain Marvel thrived in 1953, but was put out of business.
Fawcett wasn't put out of business, they reached an out of court settlement with DC to stop publishing Captain Marvel. One of the reasons they threw in the towel on the court case was because sales on the Marvel Family titles were down, so the fight was no longer worth their time and money.

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Still, the clear winner was Superman in six titles: Superman, Superboy, Action, Adventure (Superboy), World's Finest, and Jimmy Olson (starting in 9/54).
Make that seven. Lois Lane got her solo title in 1958.