hmmm... i wouldn't even break it down to people... I'd break it down to schools/eras.
Seattle School
Oakland School
Chinatown School
The seattle school would be the earliest era of JKD, Oakland being the middle era and Chinatown being the last school in the progression before Lee's death. Innosanto would come from the Chinatown period since those are the times he trained with Lee. James Lee would be oakland and Taki Kimura up in seatle.
If you are looking for the latest progression of JKD before Lee's death you might want to start with guys from the Chinatown school; Innosanto, Ted Wong, Bill Bremer, Lary Hartsell and their students etc. Each era has something to offer and can give you insight on what Lee's progression was like as he grew older. Tim Tackett (one of my teachers when I was in high school and 2nd generation chinatown JKD student) wrote a really good article on this:
http://www.jkdwednite.com/observingdif.htm