I'm afraid that we're unlikely to find the likes of a Jim Williams or Bob Pease again - these guys had the unique ability to break down complex topics and explain them in ways that laymen could understand. They had great intuition about how things work, and how to exploit their properties. Their legacy will live on in the books, publications, application notes, etc. that they produced.
Widlar was another character - brilliant and quite eccentric. There are a lot of other analog gurus that are around that helped to shape the analog IC industry - Brokaw, Gilbert, Addis, Erdi, and many more that I'm forgetting. The accomplishments of these wizards is often behind the scenes, since they weren't as widely published as Williams and Pease.
Amateur, part-time "educators" like myself can only hope to come close to the likes of these guys!
Oh, and I agree - Vincent's AmpHour show was great! About 2.5x longer than my appearance!