Provide a detailed professional biographical information about at least five influential scholars and practitioners in the field of evaluation (either living or deceased).

Include important terms, processes, strategies, or techniques associated with each person and the legacy that their contributions left on the field.

Your information should go much deeper than encyclopedic-level information available in sources such as Wikipedia.

Also, explain any global implications of the leaders' work.

You may find resources that categorize influential scholars and practitioners based on their theoretical or philosophical perspectives.

Explore how these orientations affect the practice of evaluation. Cite all work.