Mr. H, Rick Rubin (as you know, and many of us know) has absolutely resurrected some folks' careers. Or at least pushed them to do things they either hadn't done in years (Johnny Cash's series of AMERICAN RECORDINGS), or NEVER did (Neil Diamond, who I've always despised-- yet the two CD's he did with Rubin have made me a fan of Diamond's-- at least on those albums).
He also produced the best (and, alas, the last) Dixie Chicks album, as well.
Memo to Macca: Work with Rubin!!!!!
in years to come/they may discover/what the air we breathe and the life we lead are all about/but it won't be soon enough for me