I'm really interested in apologetics, and am maybe considering going into the field in the future. What are some good apologists either on a general Christian level or a Reformed level?
The following is a selective brief list of the most popular Reformed apologists.
Van Tillian Presuppositionalists
Cornelius Van Til
Greg Bahnsen
John M. Frame
Vern Poythress
Scott Oliphint
William Edgar
James White
Though most of his work would be considered theological, Richard L. Pratt Jr. wrote at a layman level an introduction to Van Tillian apologetics in his book "Every Thought Captive" which I recommend.
A couple of years ago I created a blog dedicated to presuppositional apologetics, especially focused on Dr. Van Til and his writings, check it out
HERE.
a couple of lesser known Van Tillians...
Michael Butler
Paul Manata
I do
not recommend Gordon Clark or his followers as a source for presuppositional apologetics for a number of reasons I do not want to get into. However, if you desire to study apologetics in general, I do recommend Calvinistic Baptist Ronald Nash, both his course lectures at biblicaltraining.org and books are of great value.
Alvin Plantinga is renowned for his work in philosophy concerning Reformed epistemology, which in my opinion seem to go hand in hand with Van Tillian presuppositionalism, as it compliments or synthesizes with the epistemology set forth by Dr. Van Til.
Francis Schaeffer though he studied under Dr. Van Til, held somewhat of an integrative approach to apologetics, influenced greatly by Herman Dooyeweerd.
Dr. R.C. Sproul is a great source for classical apologetics from a Reformed perspective. Dr. Sproul followed in the footsteps of John H. Gerstner.
A couple of NON-Reformed apologists you might check out:
John Warwick Montgomery (Lutheran and evidentialist)
J.P. Moreland (classical apologist)
Gary Habermas (evidentialist?)
An apologist one can learn from but should exercise caution and understand their views beforehand:
Norman Geisler - (used to be my favorite Christian apologist, especially when I was an Arminian with a classical approach to apologetics) unfortunately Dr. Geisler's views of Calvinism and presuppositionalism are both tainted, and although he has referred to himself as a "moderate Calvinist", I have listened to him speak on Calvinism, and he actually strikes me as an Anti-Calvinist. Years ago Dr. James White wrote a rebuttal of Geisler's "Chosen But Free" entitled "The Potter's Freedom", which helped shed some light on where Geisler stands. The reason I mention him at all is because a person can learn a great deal about general apologetics from Geisler, of course the method he embraces is the classical approach.
Finally, C.S. Lewis is the most overrated apologist ever. If more people knew about his theological views, I suspect his popularity would decrease.