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The closest in scale would be the Playskool Heroes line currently. Prior to the Heroes line they made Marvel Super Hero Squad figures. Though not as articulated as Imaginext or Playskool Heroes they did offer more female characters. Unfortunately that line has been discontinued in favor of the Playskool Heroes line and you may be able find many of the figures on eBay but be prepared some of the characters can be a bit pricey.
Hope this helps.