It all sounds a bit peripheral, though.
Yes I agree! I wasn't endorsing Koparkar or Dave Roell. Even with my limited understanding I can see he is as more modern than Jyotish in his inspiration.
I appreciate you are looking at this subject for an article covering the last century. Still looking at regular book recommendations on popular introductions to Jyotish might give you a steer where to focus on in the later phase.
Indian
B.V. Raman
N. P. Subramania Iyer
Belpin Behari,
Gopesh Kumar Ojha
K.S Krishnamurti
Ramkrishna Bhat
Dr. K. S. Charak
Chandulal S. Patel
Rama.R Rao
Kotamraju Narayan Rao
Manik Chand Jain
Komilla Sutton
Western
Robert De Luce
David Frawley
Hart DeFouw
Robert Svobodoa
James T. Braha
Valerie Roebuck
Dennis Flaherty
Barbara Cameron
William Levacy
Richard Houck
Ronnie Dreyer
I find it interesting that the post WWII popularisation of Indian astrology was initially heavily focused on American astrologers. One might have thought the United Kingdom was tailor made for a strong interest in Indian astrology with the Imperial link to India and the arrival of a large Indian immigrant community in Britain after WWII. However, even to this day there are not that many high quality practitioners of Indian astrology in the UK outside the ethnic Indian/South Asian community.
Like the American practitioners of Vedic astrology many British astrologers were clearly looking for something different from modern western astrology from the 1980's onwards. However, while large numbers of Americans turned to Indian astrological teachings it seems similar minded British astrologers almost exclusively turned instead to traditional methods within their own astrological tradition.
Incidentally, what about pioneers of Indian astrology in the non-English speaking parts of Europe? Prior to WWII there seems to have been considerable interest in Indian astrology amongst German astrologers.
In particular Otto Von Bressensdorff (1921) , Johannes Stoeffler (1921-22), Wilhelm Wulffe (1929 onwards) , Dr A Schoeler (1930-1) Alfred Grimm (1926-31). Prior to WWI there are also numerous articles on Indian astrology by Karl Brandler-Pracht, and Dr Christian W?llner
Here is the full bibliography:
http://www.hermes-astrologie.com/english/litind.htm
The sheer volume of this literature means that interest in Jytoish must have been quite strong in the pre-WWII German astrological community. Unfortunately, the persecution of German astrologers under the Nazis must have seriously retarded such progressive developments.
Mark