Ray Benson of Asleep At The Wheel. O'Kay. The best Pop singer; Male Vocalist Catagory? Thats a stretch. I have most of AATW albums; nice stuff; I'd rather listen to the original Bill Monroe versions though; I find they get a little strident at times.
The names you mention; I don't see them as country artists; they are pop singers who as you say sing in a nasal whine. The original reason for that sound from country artists is that they needed to be heard over the fiddles and consequently they projected their voices by tightening their pharengeal muscles.
Who's Geaorgie Fame?BTW; on AudioKarma the guys have started a CD collection trade thread. They all rip CD's composed of their favorite songs then trade them amongst each other in order to educate themselves about the music the members like.
Man; is that a great idea or what?