To me personally, a gendered pantheism is pretty paradoxical. But if you can connect with it better, then sure, go ahead
I think it's quite widespread to identify pantheistic concepts of deity as feminine if the idea stems from deity = nature/objective universe. Even in Judaism, the creation-aspect of god is conceptualized as the female Shekina.
And I can only agree with your and Kirran's ideas; Shaktism and Wicca would also be my first ideas on it.
But there are some other goddesses that come to my mind which could be interpreted to fit as well:
Creator/All-mother goddesses like Tiamat (Sumerian/Akkadian) and Babalon (Thelemic) (they have consorts, but you can re-interpret the myths)
Discordia/Eris (in the Discordianistic interpretation) - she's among the deities I can relate to best and whose names I use for the divine all.
Earth goddesses, if that's your thing. There are a ton, so I'm not going to list them.