Hello, newenglandsun,
Keep in mind that even among Thomists there are different schools. Fr. Garrigou-Legrange, O.P., has a very different outlook from Etienne Gilson. Both were trying to be faithful to the Church and to the Master, but have different interpretations.
Here is a very incomplete list, from the top of my head.
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Caveat: the classification is very much debatable!
“Classical” Thomists (who follow largely the interpretive school begun by Thomas de Vio, also known as Cajetan, and Francesco Silvestri):
Reginald Garrigou-Lagrange, O.P.
Tomas Tyn, O.P. (Don’t know if his work has been published in English.)
Jacques Maritain (with some
rapprochement to the next group, below.)
Joseph Gredt, O.S.B. (Don’t think he has anything published in English, however.)
Louis-Bertrand Geiger, O.P.
John Wippel
Jan Aertsen
Fran O’Rourke
William Norris Clarke, S.J.
Thomists who, while follwing Thomas closely, usually do not follow Cajetan’s interpretations:
Etienne Gilson
Cornelio Fabro, C.S.S.
Josef de Finance, S.J. (with some affinity for the so-called transcendental Thomists; again, I don’t think he has a lot published in English).
I am not sure where to classify Karol Wojtila (Bl. John Paul II), because his fundamental principles are basically of the second school, but his method and writing style are very different.
I include here some of the so-called “transcendental Thomists,” who attempt to justify Thomas’ philosophy starting with the principles of Kant or Heidegger:
Joseph Marechal, S.J. (I don’t know if there are any English editions.)
Johannes Baptist Lotz, S.J. (I don’t know if there are any English editions.)
(Karl Rahner, S.J., is in this tradition, but I would recommend his work only with certain reservations.)
As regards non-Thomistic philosophers/theologians:
The following three are not Thomistic in their method, but I wouldn’t call them anti-Thomistic either:
Josef Ratzinger (Benedict XVI) (Very recommendable as a theologian, all around, and not just because he was Pope
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.)
Hans Urs von Balthasar
Henri de Lubac
Those who are more sharply non-Thomistic:
Maurice Blondel (from the 19th Century)
Jean-Luc Marion (still alive)
I am sure there are a lot of others, but that is all I can think of right now. Hope this helps!