50 Wise Public Speakers is a wonderful resource put together by Phil Vendetti at Clover Park Technical College in Tacoma, WA. Phil interviewed 50 prominent speakers, and his public speaking students edited the interviews and wrote transcripts for accessibility purposes.
In the category section, you can search for speakers by genre.
In the Questions section, you can search for topics like ‘overcoming stage fright’.
In the speakers section, you can search by name.
This wonderful trailer the students put together will give you an overview of the project:
Everything about the project is shared under a CC BY Open Educational License. In other words, you can legally use it, share it, etc.