Myra Fried

From Muppet Wiki

Myra Fried is a Canadian actress, puppeteer, and writer who provided the facial puppetry and voice for Ma Gorg in the first season of Fraggle Rock, as well as assisting on Marjory the Trash Heap. She also served as a background puppeteer in Follow That Bird.

Non-puppetry credits include voice work on Nelvana's Ewoks animated series and writing for the series Brace Face and The Zack Files.