I happened to see all three of the above on the same stage on the same night at the Beacon Theatre in NY. And the answer to your question is Stevie Ray Vaughan is to me.
Sorry CV but your "southern rock" comment shows your ignorance in regards to SRV's music.

SRV is a modern interperetation of the Blues.I have seen Robert Lockwood Jr live and he is genuine blues.What SRV did was get people listening to the blues when hair metal and synth music was popular.No small feat for sure.To say that he wasnt original isnt really accurate either.He made those songs his own.He didnt merely rip off some Albert King licks per baitem.He had his own voice.Listen to In Step and in particular Crossfire and The Wall of Denial .Good original stuff as is Pride and Joy and Couldnt Stand the Weather.

Someone once told me (early guitar teacher maybe) the blues is making your heart bleed through an instrument (guitar, voice, accordion? ) .. If such is the case, there is no denying SRV was a bluesman. Doesn't matter if its Southern Rock / Blues, delta blues, Chicago Blues. If it hits you and you feel it, it's all good!

That being said, I'm more of a Clapton fan, but I love me some Stevie Ray. Anyone interested, youtube Clapton and SRV playing After Midnight. Live performance, but the video is a compilation photos.. great song. I'd post the link, but lunch break is over!

Texas Blues what ever you want to cal it. It is not true Blues it was a sub genre. SRV never impressed me like others and when I seen him the music was to loud and distorted and he lived up to the drunk reputation and it showed in play. Your showing your ignorance in the use of Blues helping to develop styles of rock and artist like Elvis and the Stones ect.

Have you heard of Chicago Blues, Delta Blues, then you can get to technical meaning of Blues and it's framework and flattened notes.

When was SRV at the Beacon with Bobby Blue and John Lee? I have been there one time many many years ago.

_________________
The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.

Thomas Jefferson

]Texas Blues what ever you want to cal it. It is not true Blues it was a sub genre. SRV never impressed me like others and when I seen him the music was to loud and distorted and he lived up to the drunk reputation and it showed in play. Your showing your ignorance in the use of Blues helping to develop styles of rock and artist like Elvis and the Stones ect.

Have you heard of Chicago Blues, Delta Blues, the you can get to technical meaning of Blues and it's framework and flattened notes.

When was SRV at the Beacon with Bobby Blue and John Lee? have been there one time many many years ago.[/quote]

how can you not call texas blues, true blues? because its a sub-genre?
chicago-blues, would you call that "true blues"?
last time i checked, chicago-blues is a sub-genre also..

Texas blues for sure is a subgenre of blues as is Chicago Blues.Texas Blues was around long before SRV.Look up people like lightning hopkins,t-bone walker, albert collins or freddie king or johnny copeland.

sure, but why isn't is "true blues"?

Long John Hunter, Lonnie and Ronnie Brooks, Clarence "Gatemouth" Brown, Johnny Winter. It's all a variation and evolution of the Delta Blues. Most of the Delta musicians traveled to Texas and Chicago to avoid working in the fields.

Exactly Supro.Muddy Waters travelled to Chicago to get out of the field and worked in a steel mill in Gary ,Indiana.BB went to Memphis and the list goes on.Texas blues IS true blues.