Isaac Bonewits (b. 1949) established a Pagan Druid organization, Ár nDraíocht Féin: A Druid Fellowship (ADF), which promotes a more scholarly approach to Paganism (and which accepts all varieties of Indo-European Paganism, not just Celtic Druidism). He is the author of several books, most notably Real Magic (1972).
Starhawk (Miriam Simos) (b. 1951) is the author of the highly influential book The Spiral Dance: A Rebirth of the Ancient Religion of the Great Goddess (1979) and the founder of the Reclaiming Coven in San Francisco. Starhawk articulated both the political as well as the spiritual implications of witchcraft in her writing, and is as well known for her political activism as her religious authority.
Edred Thorsson (pen name of Stephen Flowers) (b. 1953) is a leading writer of books on the spirituality of the Runes and the religion of the ancient Norse. His books include Futhark: A Handbook of Rune Magic (1984) and A Book of Troth (1989).
This list is partial, incomplete, and is not intended to be comprehensive or universal. Because most forms of Paganism are decentralized and emphasize personal spiritual experience rather than religious dogma or doctrines, founding figures play a much smaller role in most Pagan paths than do the founders of other religious traditions.