Not too many left from bluegrass music's first generation... 

https://bluegrasstoday.com/curly-seckler-passes/

He left a big impression on a lot of people. His take on "Dig A Hole in the Meadow" is still one of my go-to tunes.

Here's a short video .  While I was familiar with Flatt & Scruggs, I don't think I knew his name.  Drove through China Grove numerous times, but I can't recall spending any time there.