My PhD topic was on Ethical leadership at a Higher education Institution so possibly there is a need for ethical leadership topics at other institutions.

The impact of leadership style on the growth and sustainability of the organizations

The Impact of Decision Making of Organizational Leaders on the Business Fortunes of Organizations

The Prediction of Business Process Outcomes Due to Distinctive Leadership Styles

Remote Leadership

Talent attraction and talent retention in a remote leadership environment

Leadership for a diverse and changing workforce

Leadership and uncertainty

Leadership as a pre-ontic emergent phenomenon. One that consistently defies ontological classification.

I found in my research that leaders are not aware of the concerns of the frontline. This then led to employees leaving the facility. Townsend wrote "Up the Organization", an excellent publication on what good leadership looks like. A must read. Maybe take a look at organizations with low turnover, and find out why employees stay.

Leading talented employees in a dynamic corporate emvironment