Darwin is gone, the great expounder of evolution, a scientist equal to Newton.
From the scienceblogs.com
As a philosopher, Swami Krishnananda was an expounder, not a formulator.
From the en.wikipedia.org
The work begun by Rav Ashi was completed by Ravina, who is traditionally regarded as the final Amoraic expounder.
From the en.wikipedia.org
Rostow is distrusted by many for his hawkish attitudes and derided even within the Administration as an expounder of outspoken and endless optimism to a President who craves good news.