Hard to pick a "best" out of the list over 40 years.
Two names stick out- "Chet" Lajeune (excuse any misspelling, Chet), and "Rusty" Scogman. Exceptional people all around who also happened to be great, almost mystical masters of their craft. Apologies to those I've worked with and didn't mention, but I know your feeling won't be hurt because I remembered Chet and Rusty's names.