Yes, I have all the material released by Robert Plant and Alison Krauss (check out AK with her band, Union Station too).Plant solo is awesome.
His work with many collaborators, including but not limited to Alison Krauss, is breathtaking.
Sabbath, for me, were & still are a fairly miserable bunch of overrated musos.
But they entertain many rock fans, and did help establish the heavy rock genre, so we can thank them for that at least.