Wikipedia has a telling quote from the Physicist, Prof. Partha Ghose;

Bose's work stood at the transition between the 'old quantum theory' of Planck, Bohr and Einstein and the new quantum mechanics of Schrödinger, Heisenberg, Born, Dirac and others.

I have always felt that Prof.S.N.Bose never got full credit and acclaim for his achievements maybe because there were so many other greats at that time though Einstein recognized his originality.