With due respect, the question itself is an invitation to fuck in clusters. Beck only makes Beck albums! Although I sympathise in that each one seems to have tacked itself onto the arse of a particular genre, like a priceless jewel that no-one notices. Like, this familiar brand of sound, only viewed through a Beck-lens. Here, you wanna see what I think of this shit?
I don't understand the truth of the older music categorisations well enough to say whether Mutations or One Foot is more blues than any of his other albums. Often I find a category of music, that I though I understood what it was, will turn out to really have referred to something else that black folks made yonks beforehand. What the hell does soul mean? I'm sure the answers are simple enough to come by, if your ear has the time ... I suppose what I must mean is that I'm just a well-meaning amateur.
However I think from my reading of Beck, that his roots are in that old country, bluegrass, jumpin round a banjo kind of thing? I think that sensibility is what cascades down and through his other work. Really you could say he's just a hijacker, but I just can't get enough of that sound, nor that sense for the absurd. Beck-lenses are where it's at.
Anyway anyway anyway. Taking Leadbelly as a yardstick for what constitues blues (getch'asses some Leadbelly, people!), One Foot is definitely the album that best adheres to the low fi, wilderland ethos, and also the first one he managed to round the end of, so that the whole thing was actually an album, and the whole thing sounds finished. It doesn't, like Mellow Gold or Soulmanure, eventually dissolve into musical gibberish, as Beck gleefully rides his inability to articulate the end of whatever sentence it was he started.
BUY MORE BECK, and START WITH ONE FOOT. It's the bomb-shizzly. Also, what does anyone know about the new album? I need dates, and I need times!