Who are the most significant scholars in organizational communication?
I want information on those who deal with chaos and/or crisis in
organizational dynamics. I want those who deal with learning
organizations prior to and following Senge. I do not want pop culture
organizational dynamics gurus but legitimate peer-reviewed scholars.

Some experts I can find on the internet. 

Fombrun, C. J. (1986). Structural dynamics within and between organizations
Hatch, M. J. (1993). The dynamics of organizational culture. Academy
of Management Review
Beyer, J. M., & Trice, H. M. (1987). How an organization's rites
reveal its culture. Organizational Dynamics
Hatvany, N., & Pucik, V. (1981). Japanese management practices and
productivity. Organizational Dynamics
Galbraith, J. R. (1982). Designing the innovating organization.
Organizational Dynamics
Monge, P. R., Cozzens, M. D., & Contractor, N. S. (1992).
Communication and motivational predictors of the dynamics of
organizational innovation. Organization Science

Best of luck