I think Hungerford's approach is somewhat reminiscent of Gilels'. Hungerford is perhaps a shades less "Olympian" than Gilels -- but they have a sort of TOUGHNESS and "no nonsense" command in common.
Or at least that's how I think about them.
EDIT: I think Hungerford is underrated, simply because he recorded for Vanguard and never had much of a career as a concert artist. But Hungerford has been recognized by some connoisseurs, which I assume played a part in Piano Classics reissuing his LvB piano sonatas.