For standard tuning
slide, check out Robert Nighthawk's recordings and those of his star pupil, Earl Hooker. Earl
only played slide in standard tuning and was truly a virtuoso player. Nighthawk's earliest recordings (30's) were done on acoustic guitar tuned to open E, but when he switched to electric in the 40's he played exclusively in standard tuning.
I think Muddy Waters' later stuff features some standard tuning slide on the slow tunes, though later on Muddy didn't play as much guitar as he did in the 40's and 50's.