Welcome to TB.
I see this is your first post, and right off jump street you say the Man "wasn't much of a blues artist."
Please inform the likes of BB King, John Hammond Jr., Buddy Guy, Little Richard, etc. with your opinion. But be gentle, and try not to embarrass them for having it all wrong for all these years.
To mess up things more I'd like to clarify some issues.
I'll present some comments from literal sources. The always polite B.B. King said: 'Jimi played blues, and he did it well; he just did it Jimi Hendrix's way.' (Shaar Murray: Crosstown Traffic).
Buddy Guy wrote in his book about playing with Jimi '... I heard him as a good bluesman who, like me, went looking for new sounds and didn't mind if he got little lost along the way.'
In Shaar Murray book Jeffrey Hammond Jr is claimed to say that Hendrix knew little about the blues before he relocated back to the USA. And we all know how deeply Hammond knew the blues, for haven't he bought as a youngster a pair of blindman's glasses and a tin cup and taken to the streets to play blues (White Negro syndrome?).
Those are rather irrelevant facts. Main point is that there are very little blues structures in Jimi's works. I think blues is quite structured music in which there are plenty of variation possibilities. One Red House doesn't make a day.
Jimi's CD Blues is a good example of his outside view of the blues; sloppy playing, no less-is-more principle, use of effects. But all this understandable because his youger years were in segregrated Seattle and his music background was in R&B and his money making era was in psychedelic rock.
But if you take blues as a spiritual state of mind, then of course Jimi had it most strongly.
I know I am an oldfashioned goof who wants make difference with blues (swamp,delta, Texas, West Coast, big city electric) and rhythm and blues (black, urbane jazz based music during 40's/50's), the forefather of rock'n'roll or of western popular music (check Wiki).
So I have trouble where to put Whitey in this context. Whitey does well folk, hillybilly, rockabilly, pop, indie, metal, arty stuff etc..
Sorry that was utterly evil minded. The fact is that white Europeans and Americans keep the blues alive. They buy records (if somebody still does), they flock on Beale Street or in various blues clubs or in concerts and festivals.
I think that in blues there is this entertainment side. It is not a competition who plays fastest or most complicated or who has the deepest sosio-political aspect.
Let late Macig Slim show you what I mean.
https://www.youtube.com/watch?v=0dBrFpQ44-o