Artists that use the same song structure...

I can only listen to Doc Watson. He was phenomenal and skillful. That's as far as my bluegrass tastes are going.

No matter how good they are for example Ricky Scaggs could not listen for more than few minutes or one song than change the record as soon as the next one starts playing with same rhythm and same bass and same structure.

I once heard a 3 sheets to the wind Roy Clark, who could play anything written for guitar , answer why such a skilled musician as he played and excelled in country.
His reply" Because it takes a real musician to play out-of-tune ALL the time " .

Czarivey,

Doc Watson was a wonderful player, but Bluegrass is full of spectacular guitarists. Check out Jerry Douglass (primary guitarist for Alison Krauss and Union Station) or Tony Rice or Bryan Sutton, among many, many others. I understand that you may find the general tonality of the genre off-putting, but there's wonderful playing talent shot throughout the bluegrass catalog. You may not find it worth the effort to acclimate to the form, but - if you do - you may be pleasantly surprised by what awaits you.

"Bluegrass is full of spectacular guitarists."
And vocalists- Alison Krauss being only the most well known; there's also EmmyLou Harris and Dolly Parton (don't laugh, listen to some of her real bluegrass stuff).
As for players, how about Mark O'Connor or Jay Unger on the violin, David Grisman on Mandolin or Bela Fleck on banjo. World class musicianship.

And not to nit-pick Martykl, but Jerry Douglass is most well known as the absolute premier dobro player in the known universe. And yes, I know some may say that a dobro is just a guitar laid across someone's lap.

Swamp, why would anyone laugh at Dolly's voice ?
She has a real-deal high-lonesome beautiful voice !