Sky Skimmer and Fluttershy. Fluttershy may have been derived from Posey, but her symbol matches Sky Skimmer's as well as her color. It actually seems more likely that G4 Fluttershy was a G2 shout-out.
Then there's Celestia looking like a G2 with her rounded head, slim body, and long legs.
Otherwise, there's G1 Twilight and G3 Savannah Sage. And G1 Bow Tie and G3 Dream Blue/Blue Mist.